CN105357415B - Image ciphering, the method and device of decryption - Google Patents

Abstract

The invention provides a method and device for encrypting and decrypting pictures. The method for encrypting pictures includes: obtaining an original picture and an encrypted picture for encrypting the original picture; converting the original picture and the encrypted picture into byte streams respectively; merging all the pictures according to the byte format of the pictures The byte stream of the original picture and the encrypted picture is obtained to obtain the byte stream of the target picture, and the target picture is generated. In the embodiment of the present invention, the target picture is generated by merging byte streams, so that the picture format of the target picture will not change, which is equivalent to adjusting the amount of picture information based on the original picture format without affecting the picture quality. Transmission or storage, while the adjustment of the image information improves the security of the image.

Description

Method and device for image encryption and decryption

technical field

The invention relates to the technical field of Internet applications, in particular to a method and device for encrypting and decrypting pictures.

Background technique

With the popularization of products such as cloud disks (or network disks), most users currently store photos taken by mobile phones or digital cameras on cloud disks, or directly on cloud albums provided by mobile phone manufacturers (such as xx cloud album, xxx cloud album, etc.).

The photos uploaded to the cloud disk or cloud album are only less likely to be lost, but the security performance has not been greatly improved, because the photos backed up by the cloud disk or cloud album are plaintext without any encryption Photos, the staff who manage the cloud album can completely see it. In addition, if hacked, the content of the photo will be read by the hacker. Therefore, for photos related to privacy, users with strong security awareness will store them in a local hidden folder or use a private space (eg, 360 private space, etc.) to encrypt them.

However, storing photos in a local hidden folder is easy to lose. When the terminal device is lost or the system crashes and cannot be turned on, and the system needs to be reinstalled, the data will be difficult to retrieve. If you use privacy control software, users will not know the format and location of their photos at all, and it is likely to be deleted as garbage by other cleaning software, which will also cause data loss. Therefore, how to increase the security of photos while preventing loss has become a technical problem to be solved urgently.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a method for encrypting and decrypting pictures and a corresponding device that overcomes the above problems or at least partially solves the above problems.

According to one aspect of the present invention, a method for encrypting pictures is provided, including:

Obtaining an original picture and an encrypted picture used for encrypting the original picture;

respectively converting the original picture and the encrypted picture into byte streams;

Merge the byte stream of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

Optionally, the merging the byte stream of the original picture and the encrypted picture according to the byte format of the picture includes:

Merge the original picture and the byte stream of the encrypted picture by using the start marker or the end marker in the byte stream of the original picture and the encrypted picture as a merge node respectively.

Optionally, using the start tag or the end tag in the byte stream of the original picture and the encrypted picture as a merging node to merge the original picture and the byte stream of the encrypted picture, including:

Determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Obtain the start tag in the byte stream of the original picture;

Setting the start marker of the original picture after the determined merging node, and sequentially adding the byte stream of the original picture.

Optionally, using the start tag or the end tag in the byte stream of the original picture and the encrypted picture as a merging node to merge the original picture and the byte stream of the encrypted picture, including:

Determining that the start tag in the byte stream of the original picture is used as the merging node;

Obtain the end marker in the byte stream of the encrypted picture;

Setting the end marker of the encrypted picture before the determined merging node, and adding the byte stream of the encrypted picture in reverse order.

Optionally, before converting the encrypted picture into a byte stream, it also includes:

Perform blurring processing on the encrypted picture to increase the image filtering function of the encrypted picture.

Optionally, the acquiring the original picture includes: acquiring the original picture to be uploaded to the cloud album from the terminal's album;

After generating the target picture, the method further includes: uploading the target picture to the cloud album.

Optionally, each byte stream exists in the form of a byte array.

According to another aspect of the present invention, a method for decrypting a picture is provided, including:

Obtaining the picture to be decrypted, and converting the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, merging the original picture and encrypting the original picture The byte stream of the processed encrypted image is obtained;

According to the byte format of the picture, extract the byte stream of the original picture from the byte stream of the picture to be decrypted, and generate the original picture.

Optionally, according to the byte format of the picture, extracting the byte stream of the original picture from the byte stream of the picture to be decrypted includes:

The byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by using the start mark or the end mark in the byte stream of the picture to be decrypted as an extraction point.

Optionally, using the start marker in the byte stream of the picture to be decrypted as an extraction point, extracting the byte stream of the original picture from the byte stream of the picture to be decrypted includes:

In the process of reading the byte stream of the picture to be decrypted, recording the appearance of the start marker in the byte stream of the picture to be decrypted;

Determining the first specified number of start markers as the extraction point, and using the byte stream including the extraction point and after the extraction point as the byte stream of the original picture.

Optionally, using the end marker in the byte stream of the picture to be decrypted as an extraction point, extracting the byte stream of the original picture from the byte stream of the picture to be decrypted includes:

During the process of reading the byte stream of the picture to be decrypted, recording the occurrence of the end marker in the byte stream of the picture to be decrypted;

Determining the second specified number of end markers as extraction points, and using the byte stream after the extraction point as the byte stream of the original picture.

According to yet another aspect of the present invention, a device for encrypting pictures is also provided, including:

The first obtaining module is adapted to obtain an original picture and an encrypted picture used for encrypting the original picture;

a first conversion module adapted to convert the original picture and the encrypted picture into byte streams;

The encryption module is adapted to combine the byte stream of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

Optionally, the encryption module is also suitable for:

Merge the original picture and the byte stream of the encrypted picture by using the start marker or the end marker in the byte stream of the original picture and the encrypted picture as a merge node respectively.

Optionally, the encryption module is also suitable for:

Determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Obtain the start tag in the byte stream of the original picture;

Setting the start marker of the original picture after the determined merging node, and sequentially adding the byte stream of the original picture.

Optionally, the encryption module is also suitable for:

Determining that the start tag in the byte stream of the original picture is used as the merging node;

Obtain the end marker in the byte stream of the encrypted picture;

Setting the end marker of the encrypted picture before the determined merging node, and adding the byte stream of the encrypted picture in reverse order.

Optionally, the device also includes:

The processing module is adapted to perform obfuscation processing on the encrypted picture before the first conversion module converts the encrypted picture into a byte stream, so as to increase the image filtering function of the encrypted picture.

Optionally, the first acquiring module is further adapted to: acquire the original picture to be uploaded to the cloud album from the album of the terminal;

The device also includes an upload module adapted to upload the target picture to the cloud album after the encryption module generates the target picture.

Optionally, each byte stream exists in the form of a byte array.

According to yet another aspect of the present invention, a device for decrypting pictures is also provided, including:

The second obtaining module is suitable for obtaining the picture to be decrypted;

The second conversion module is adapted to convert the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, merging the original picture and used to process the original picture Obtained from the byte stream of the encrypted image processed by encryption;

The decryption module is adapted to extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original picture.

Optionally, the decryption module is also suitable for:

The byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by using the start mark or the end mark in the byte stream of the picture to be decrypted as an extraction point.

Optionally, the decryption module is also suitable for:

In the process of reading the byte stream of the picture to be decrypted, recording the appearance of the start marker in the byte stream of the picture to be decrypted;

Determining the first specified number of start markers as the extraction point, and using the byte stream including the extraction point and after the extraction point as the byte stream of the original picture.

Optionally, the decryption module is also suitable for:

During the process of reading the byte stream of the picture to be decrypted, recording the occurrence of the end marker in the byte stream of the picture to be decrypted;

Determining the second specified number of end markers as extraction points, and using the byte stream after the extraction point as the byte stream of the original picture.

The embodiment of the present invention provides a new idea of picture encryption, that is, the original picture and the encrypted picture used to encrypt the original picture are obtained, and then the original picture and the encrypted picture are respectively converted into byte streams, and then according to the The byte format combines the byte stream of the original picture and the encrypted picture to obtain the byte stream of the target picture, and generates the target picture. In the embodiment of the present invention, the target picture is generated by merging byte streams, so that the picture format of the target picture will not change, which is equivalent to adjusting the amount of picture information based on the original picture format, without affecting the picture quality. Transmission or storage, while the adjustment of the image information improves the security of the image.

Further, for the encrypted target picture, the embodiment of the present invention provides a method for decrypting it, which can quickly and accurately extract the original picture from the target picture. That is, obtain the picture to be decrypted (encrypted target picture), convert the picture to be decrypted into a byte stream, and then extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original image.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the specific embodiments of the present invention are enumerated below.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:

Fig. 1 shows the schematic diagram of the binary byte stream of the image file in jpeg format;

Figure 2 shows a schematic diagram of a hexadecimal byte stream of a picture file in jpeg format;

Fig. 3 shows the flowchart of the method for picture encryption according to one embodiment of the present invention;

FIG. 4 shows a flowchart of a method for merging byte streams according to an embodiment of the present invention;

FIG. 5 shows an effect diagram after byte stream merging processing according to an embodiment of the present invention;

FIG. 6 shows a flowchart of a method for merging byte streams according to another embodiment of the present invention;

FIG. 7 shows an effect diagram of a generated target picture according to an embodiment of the present invention;

FIG. 8 shows a flowchart of a method for encrypting pictures according to yet another embodiment of the present invention;

Fig. 9 shows a schematic diagram of picture effects before and after encryption according to an embodiment of the present invention;

FIG. 10 shows a flowchart of a method for decrypting a picture according to an embodiment of the present invention;

FIG. 11 shows a flowchart of a method for extracting byte streams of original pictures according to one embodiment of the present invention;

Fig. 12 shows a flowchart of a method for extracting byte streams of original pictures according to another embodiment of the present invention;

Fig. 13 shows the rendering of the original picture extracted according to the present invention;

Fig. 14 shows a schematic structural diagram of a device for encrypting pictures according to an embodiment of the present invention;

Fig. 15 shows a schematic structural diagram of a device for encrypting pictures according to another embodiment of the present invention; and

Fig. 16 shows a schematic structural diagram of an apparatus for decrypting a picture according to an embodiment of the present invention.

detailed description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

The image or picture format is the format used by the computer to store pictures. Common storage formats include bmp (bitmap, bitmap), jpg or jpeg (joint photographic expert group, joint photo expert group), tiff (tag imagefile format, tag image file format) , gif (graphics interchange format, graphics interchange format), etc. For example, the bmp image format, which is an image file format independent of hardware devices, is widely used. It uses a bitmap storage format, and does not use any compression except for the optional image depth, so the bmp file takes up a lot of space. The image depth of the bmp file can be selected from lbit (bit), 4bit, 8bit and 24bit. When a bmp file stores data, the scanning method of the image is from left to right and from bottom to top. Since the bmp file format is a standard for exchanging graph-related data in the Windows (window) environment, all graphics and image software running in the Windows environment support the bmp image format. A typical bmp image file is composed of three parts: a bitmap file header data structure, which includes information such as the type and display content of the bmp image file; a bitmap information data structure, which includes the width, height, and compression method of the bmp image; and Define information such as colors.

The jpeg image format is the most commonly used image file format. It is formulated by a software development association. It is a lossy compression format that can compress images in a small storage space. Repeated or unimportant data in the image will be deleted. Lost, so it is easy to cause damage to image data. In particular, if the compression ratio is too high, the quality of the restored image after decompression will be significantly reduced. If you pursue high-quality images, you should not use an excessive compression ratio. However, jpeg compression technology is very advanced. It uses lossy compression to remove redundant image data, and can display very rich and vivid images while obtaining extremely high compression rates. Good image quality. Moreover, jpeg is a very flexible format, which has the function of adjusting image quality, allows files to be compressed with different compression ratios, supports multiple compression levels, and the compression ratio is usually between 10:1 and 40:1. The larger the value, the lower the quality; conversely, the smaller the compression ratio, the better the quality. For example, a 1.37Mb bmp bitmap file can be compressed to 20.3KB. Of course, you can also find a balance between image quality and file size. The jpeg format mainly compresses high-frequency information, and retains color information better. It is suitable for use on the Internet, can reduce image transmission time, can support 24bit true color, and is also widely used in images that require continuous tone.

A picture file can be converted into a form of a byte stream, and FIG. 1 is a schematic diagram of a binary byte stream of a picture file in jpeg format. In Figure 1, <start> is the start tag of the picture, and <end> is the end tag of the picture. FIG. 2 is a schematic diagram of a hexadecimal byte stream of a picture file in jpeg format. In FIG. 2, "FF D8" is the start mark of the picture, and "FF D9" is the end mark of the picture.

The applicant found that adding any content after the end tag of the picture will not affect the content of the picture. Therefore, a sentence, a URL (Uniform Resource Locator, Uniform Resource Locator) address, or even a URL can be added after the end tag of the picture. The whole picture, etc.

Based on the above principles, an embodiment of the present invention provides a method for encrypting pictures, which can be applied in a terminal or a server. Fig. 3 shows a flowchart of a method for encrypting pictures according to an embodiment of the present invention. As shown in Figure 3, the method at least includes the following steps S302 to S306:

Step S302, obtaining the original picture and the encrypted picture used for encrypting the original picture;

Step S304, respectively converting the original picture and the encrypted picture into a byte stream;

Step S306: Merge the byte streams of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

The embodiment of the present invention provides a new idea of picture encryption, that is, the original picture and the encrypted picture used to encrypt the original picture are obtained, and then the original picture and the encrypted picture are respectively converted into byte streams, and then according to the The byte format combines the byte stream of the original picture and the encrypted picture to obtain the byte stream of the target picture, and generates the target picture. In the embodiment of the present invention, the target picture is generated by merging byte streams, so that the picture format of the target picture will not change, which is equivalent to adjusting the amount of picture information based on the original picture format, without affecting the picture quality. Transmission or storage, while the adjustment of the image information improves the security of the image.

In step S306, the byte streams of the original picture and the encrypted picture are merged according to the byte format of the picture. This embodiment of the present invention provides an optional solution, in which the character streams of the original picture and the encrypted picture can be respectively The start tag or end tag in throttling is used as a merge node to merge the byte streams of the original picture and the encrypted picture.

Fig. 4 shows a flowchart of a method for merging byte streams according to an embodiment of the present invention. As shown in Figure 4, the method at least includes the following steps S402 to S406:

Step S402, determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Step S404, obtaining the start marker in the byte stream of the original picture;

Step S406, setting the start marker of the original picture after the determined merging node, and sequentially adding the byte stream of the original picture.

Taking the binary byte stream of an image file in jpeg format as an example, the combined effect diagram is shown in Figure 5. In Figure 5, the byte stream between the first pair of <start> and <end> is the byte stream of the encrypted picture, and the byte stream between the second pair of <start> and <end> is the byte stream of the original picture throttling.

Fig. 6 shows a flowchart of a method for merging byte streams according to another embodiment of the present invention. As shown in Figure 6, the method at least includes the following steps S602 to S606:

Step S602, determining to use the start marker in the byte stream of the original picture as the merge node;

Step S604, obtaining the end marker in the byte stream of the encrypted picture;

Step S606, setting the end marker of the encrypted picture before the determined merging node, and adding the byte stream of the encrypted picture in reverse order.

According to the combined byte stream obtained by the method in FIG. 4 or FIG. 6 , an effect diagram of the target picture generated by it is shown in FIG. 7 . In Figure 7, the original picture is hidden in the second layer of the encrypted picture intact, and the encrypted picture is placed on the first layer.

In order to obtain further effective protection, before converting the encrypted picture into a byte stream, the embodiments of the present invention may further perform obfuscation processing on the encrypted picture, so as to increase the image filtering function of the encrypted picture. The blurring processing here may adopt methods such as Gaussian blurring, mosaicing, and resolution reduction, which are not limited in the present invention. In particular, the Gaussian blur technology is irreversible, and the blurred picture can effectively protect the privacy content, and the rough outline can make the user have a certain perception. It is completely invisible and humanized.

As mentioned above, because the photos backed up by the cloud disk or cloud album are plaintext photos without any encryption, the staff who manage the cloud album can completely see them. In addition, if hacked, the content of the photo will be read by the hacker. In order to solve this problem, another processing link can be added between the two steps of taking pictures and uploading to cloud disk or cloud album, that is, picture (photo) encryption. Fig. 8 shows a flowchart of a method for encrypting a picture according to yet another embodiment of the present invention. As shown in FIG. 8, the method at least includes the following steps S802 to S812.

Step S802, obtaining the original picture to be uploaded to the cloud album from the album of the terminal.

In this step, taking a mobile phone with an Android system as an example, the original photo file can be read from the photo album to the internal memory, and the original photo file can be read using the Bitmap class that comes with Android (Android).

Step S804, obtaining an encrypted image for encrypting the original image, and performing blurring processing on the encrypted image, so as to increase the image filtering function of the encrypted image.

In this step, Gaussian blurring, mosaicing, resolution reduction, etc. may be used for blurring, which is not limited in the present invention.

Step S806, converting the original picture and the encrypted picture after blurring into byte streams respectively.

In step S808, it is determined to use the end marker in the byte stream of the encrypted picture as the merging node.

Step S810, obtain the start marker in the byte stream of the original picture, and set the start marker of the original picture after the determined merge node, and sequentially add the byte stream of the original picture to obtain the byte stream of the target picture, and generate target image.

FIG. 9 is a schematic diagram of picture effects before and after encryption. In Fig. 9, the picture on the left is the original picture before encryption, and the picture on the right is the target picture after encryption.

Step S812, uploading the target picture to the cloud album.

In this embodiment, each byte stream may exist in the form of a byte array.

In the embodiment of the present invention, the format of the original picture is not changed, and it is stored completely according to the normal picture, which does not affect the application to use any merchant's cloud album or cloud disk. That is to say, the encrypted target photo can be backed up to the cloud album without loss. And other people (such as the staff of the cloud album or hackers) only see blurred photos, so as to achieve the purpose of safety and no loss.

Moreover, the embodiment of the present invention performs blurring processing on the encrypted picture, and merges the processed encrypted picture and the byte stream of the original picture to generate the target picture, which can effectively protect the privacy content, and the rough outline can make the user have a certain perception , This is better than privacy space software that completely changes the image storage format and is completely invisible to the user. The processing method is humanized.

Correspondingly, the embodiment of the present invention provides a method for decrypting a picture, and the method can be applied in a terminal or a server. Fig. 10 shows a flowchart of a method for decrypting a picture according to an embodiment of the present invention. As shown in Figure 10, the method at least includes the following steps S1002 to S1004:

Step S1002, obtain the picture to be decrypted, and convert the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, combining the original picture and the encryption used to encrypt the original picture The byte stream of the picture is obtained;

Step S1004, according to the byte format of the picture, extract the byte stream of the original picture from the byte stream of the picture to be decrypted, and generate the original picture.

For the encrypted target picture, the embodiment of the present invention provides a method for decrypting it, which can quickly and accurately extract the original picture from the target picture. That is, obtain the picture to be decrypted (encrypted target picture), convert the picture to be decrypted into a byte stream, and then extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original image.

In step S1004, according to the byte format of the picture, the byte stream of the original picture is extracted from the byte stream of the picture to be decrypted. The embodiment of the present invention provides an optional solution. In this solution, the The start mark or end mark in the byte stream of the decrypted picture is used as an extraction point, and the byte stream of the original picture is extracted from the byte stream of the picture to be decrypted.

Fig. 11 shows a flowchart of a method for extracting a byte stream of an original picture according to an embodiment of the present invention. As shown in Figure 11, the method at least includes the following steps S1102 to S1104:

Step S1102, during the process of reading the byte stream of the picture to be decrypted, record the occurrence of the start marker in the byte stream of the picture to be decrypted;

Step S1104, determine the first specified number of start markers as extraction points, and use the byte stream including the extraction point and the byte stream after the extraction point as the byte stream of the original picture.

In this step, the third start mark can be read, because the photos taken by the mobile phone will record the shooting information (such as time, place, etc.) in front of the original picture (that is, the original photo), so the There are actually two start tags. Moreover, it is found through experiments that the encrypted picture after blurring processing also has two start marks, so the content behind the third start mark is the original picture.

Fig. 12 shows a flowchart of a method for extracting a byte stream of an original picture according to another embodiment of the present invention. As shown in Figure 12, the method at least includes the following steps S1202 to S1204:

Step S1202, during the process of reading the byte stream of the picture to be decrypted, record the appearance of the end marker in the byte stream of the picture to be decrypted.

Step S1204, determining a second specified number of end markers as the extraction point, and taking the byte stream after the extraction point as the byte stream of the original picture.

Taking the binary byte stream of a picture file in jpeg format as an example, the rendering of extracting the original picture is shown in Figure 13.

Based on the methods for encrypting and decrypting pictures provided in the above embodiments and based on the same inventive concept, an embodiment of the present invention further provides a device for encrypting and decrypting pictures.

Fig. 14 shows a schematic structural diagram of an apparatus for encrypting pictures according to an embodiment of the present invention. As shown in FIG. 14 , the apparatus 1400 may at least include a first obtaining module 1410 , a first conversion module 1420 and an encryption module 1430 .

Now introduce the functions of each component or device of the image encryption device 1400 in the embodiment of the present invention and the connection relationship between each part:

The first acquiring module 1410 is adapted to acquire an original picture and an encrypted picture used for encrypting the original picture;

The first conversion module 1420, coupled with the first acquisition module 1410, is adapted to convert the original picture and the encrypted picture into byte streams;

The encryption module 1430, coupled with the first conversion module 1420, is adapted to combine the byte stream of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

In an embodiment of the present invention, the encryption module 1430 is also suitable for:

The byte streams of the original picture and the encrypted picture are merged by using the start mark or the end mark in the byte stream of the original picture and the encrypted picture as the merging node respectively.

In an embodiment of the present invention, the encryption module 1430 is also suitable for:

Determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Get the start tag in the byte stream of the original picture;

The start marker of the original picture is set after the determined merging node, and the byte stream of the original picture is sequentially added.

In an embodiment of the present invention, the encryption module 1430 is also suitable for:

Make sure to use the start tag in the byte stream of the original picture as the merge node;

Obtain the end marker in the byte stream of the encrypted image;

Set the end marker of the encrypted picture before the determined merging node, and add the byte stream of the encrypted picture in reverse order.

In an embodiment of the present invention, as shown in FIG. 15, the device shown in FIG. 14 may further include:

The processing module 1440, coupled with the first obtaining module 1410, is adapted to perform obfuscation processing on the encrypted picture before the first conversion module 1420 converts the encrypted picture into a byte stream, so as to increase the filtering function of the encrypted picture.

In an embodiment of the present invention, the first acquiring module 1410 is further adapted to: acquire the original picture to be uploaded to the cloud album from the album of the terminal;

The image encryption device may also include an upload module 1450, coupled with the encryption module 1430, adapted to upload the target image to the cloud album after the encryption module 1430 generates the target image.

In an embodiment of the present invention, each byte stream exists in the form of a byte array.

Correspondingly, FIG. 16 shows a schematic structural diagram of an apparatus for decrypting a picture according to an embodiment of the present invention. As shown in FIG. 16 , the apparatus 1600 may at least include a second obtaining module 1610 , a second converting module 1620 and a decrypting module 1630 .

Now introduce the functions of each component or device of the image decryption device 1600 according to the embodiment of the present invention and the connection relationship between each part:

The second obtaining module 1610 is adapted to obtain the picture to be decrypted;

The second conversion module 1620, coupled with the second acquisition module 1610, is adapted to convert the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, combining the original picture and the It is obtained by encrypting the byte stream of the encrypted picture of the original picture;

The decryption module 1630, coupled with the second conversion module 1620, is adapted to extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original picture.

In an embodiment of the present invention, the decryption module 1630 is also suitable for:

The byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by taking the start mark or the end mark in the byte stream of the picture to be decrypted as an extraction point.

In an embodiment of the present invention, the decryption module 1630 is also suitable for:

In the process of reading the byte stream of the picture to be decrypted, record the occurrence of the start marker in the byte stream of the picture to be decrypted;

Determine the first specified number of start markers as extraction points, and use the byte stream including the extraction point and the byte stream after the extraction point as the byte stream of the original picture.

In an embodiment of the present invention, the decryption module 1630 is also suitable for:

In the process of reading the byte stream of the picture to be decrypted, record the occurrence of the end mark in the byte stream of the picture to be decrypted;

Determine the second specified number of end markers as extraction points, and use the byte stream after the extraction point as the byte stream of the original picture.

According to any one of the above preferred embodiments or a combination of multiple preferred embodiments, the embodiments of the present invention can achieve the following beneficial effects:

The embodiment of the present invention provides a new idea of picture encryption, that is, the original picture and the encrypted picture used to encrypt the original picture are obtained, and then the original picture and the encrypted picture are respectively converted into byte streams, and then according to the The byte format combines the byte stream of the original picture and the encrypted picture to obtain the byte stream of the target picture, and generates the target picture. In the embodiment of the present invention, the target picture is generated by merging byte streams, so that the picture format of the target picture will not change, which is equivalent to adjusting the amount of picture information based on the original picture format, without affecting the picture quality. Transmission or storage, while the adjustment of the image information improves the security of the image.

Further, for the encrypted target picture, the embodiment of the present invention provides a method for decrypting it, which can quickly and accurately extract the original picture from the target picture. That is, obtain the picture to be decrypted (encrypted target picture), convert the picture to be decrypted into a byte stream, and then extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original image.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, in order to streamline this disclosure and to facilitate an understanding of one or more of the various inventive aspects, various features of the invention are sometimes grouped together in a single embodiment, figure, or its description. This method of disclosure, however, is not to be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the Detailed Description are hereby expressly incorporated into this Detailed Description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be adaptively changed and arranged in one or more devices different from the embodiment. Modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore may be divided into a plurality of sub-modules or sub-units or sub-assemblies. All features disclosed in this specification (including accompanying claims, abstract and drawings) and any method or method so disclosed may be used in any combination, except that at least some of such features and/or processes or units are mutually exclusive. All processes or units of equipment are combined. Each feature disclosed in this specification (including accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will understand that although some embodiments described herein include some features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of the invention. and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

The various component embodiments of the present invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art should understand that a microprocessor or a digital signal processor (DSP) can be used in practice to implement some or all functions of some or all components in the image encryption and decryption device according to the embodiment of the present invention. The present invention can also be implemented as an apparatus or an apparatus program (for example, a computer program and a computer program product) for performing a part or all of the methods described herein. Such a program for realizing the present invention may be stored on a computer-readable medium, or may be in the form of one or more signals. Such a signal may be downloaded from an Internet site, or provided on a carrier signal, or provided in any other form.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

So far, those skilled in the art should appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, the disclosed embodiments of the present invention can still be used. Many other variations or modifications consistent with the principles of the invention are directly identified or derived from the content. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

The embodiment of the invention also discloses:

A1, a method for picture encryption, comprising:

Obtaining an original picture and an encrypted picture used for encrypting the original picture;

respectively converting the original picture and the encrypted picture into byte streams;

Merge the byte stream of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

A2. The method according to A1, wherein the merging the byte stream of the original picture and the encrypted picture according to the byte format of the picture includes:

Merge the original picture and the byte stream of the encrypted picture by using the start marker or the end marker in the byte stream of the original picture and the encrypted picture as a merge node respectively.

A3. The method according to A2, wherein, using the start marker or the end marker in the byte stream of the original picture and the encrypted picture respectively as a merge node, the bytes of the original picture and the encrypted picture are Streams are merged and processed, including:

Determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Obtain the start tag in the byte stream of the original picture;

Setting the start marker of the original picture after the determined merging node, and sequentially adding the byte stream of the original picture.

A4. The method according to A2, wherein, using the start marker or the end marker in the byte stream of the original picture and the encrypted picture respectively as a merge node, the bytes of the original picture and the encrypted picture are Streams are merged and processed, including:

Determining that the start tag in the byte stream of the original picture is used as the merging node;

Obtain the end marker in the byte stream of the encrypted picture;

Setting the end marker of the encrypted picture before the determined merging node, and adding the byte stream of the encrypted picture in reverse order.

A5. The method according to any one of A1-A4, wherein, before converting the encrypted picture into a byte stream, it also includes:

Perform blurring processing on the encrypted picture to increase the image filtering function of the encrypted picture.

A6. The method according to any one of A1-A5, wherein said acquiring the original picture includes: acquiring the original picture to be uploaded to the cloud album from the terminal's album;

After generating the target picture, the method further includes: uploading the target picture to the cloud album.

A7. The method according to any one of A1-A6, wherein each byte stream exists in the form of a byte array.

A8, a method for picture decryption, comprising:

Obtaining the picture to be decrypted, and converting the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, merging the original picture and encrypting the original picture The byte stream of the processed encrypted image is obtained;

According to the byte format of the picture, extract the byte stream of the original picture from the byte stream of the picture to be decrypted, and generate the original picture.

A9. The method according to A8, wherein, according to the byte format of the picture, extracting the byte stream of the original picture from the byte stream of the picture to be decrypted includes:

The byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by using the start mark or the end mark in the byte stream of the picture to be decrypted as an extraction point.

A10. The method according to A9, wherein the byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by using the start marker in the byte stream of the picture to be decrypted as the extraction point, include:

In the process of reading the byte stream of the picture to be decrypted, recording the appearance of the start marker in the byte stream of the picture to be decrypted;

Determining the first specified number of start markers as the extraction point, and using the byte stream including the extraction point and after the extraction point as the byte stream of the original picture.

A11. The method according to A9, wherein the byte stream of the original picture is extracted from the byte stream of the picture to be decrypted, using the end marker in the byte stream of the picture to be decrypted as the extraction point, include:

During the process of reading the byte stream of the picture to be decrypted, recording the occurrence of the end marker in the byte stream of the picture to be decrypted;

Determining the second specified number of end markers as extraction points, and using the byte stream after the extraction point as the byte stream of the original picture.

B12. A device for encrypting images, comprising:

The first obtaining module is adapted to obtain an original picture and an encrypted picture used for encrypting the original picture;

a first conversion module adapted to convert the original picture and the encrypted picture into byte streams;

The encryption module is adapted to combine the byte stream of the original picture and the encrypted picture according to the byte format of the picture to obtain the byte stream of the target picture, and generate the target picture.

B13. The device according to B12, wherein the encryption module is further adapted to:

Merging the original picture and the byte stream of the encrypted picture by using the start marker or the end marker in the byte stream of the original picture and the encrypted picture as a merge node respectively.

B14. The device according to B13, wherein the encryption module is further adapted to:

Determine to use the end marker in the byte stream of the encrypted picture as the merge node;

Obtain the start tag in the byte stream of the original picture;

Setting the start marker of the original picture after the determined merging node, and sequentially adding the byte stream of the original picture.

B15. The device according to B13, wherein the encryption module is further adapted to:

Determining that the start tag in the byte stream of the original picture is used as the merging node;

Obtain the end marker in the byte stream of the encrypted picture;

Setting the end marker of the encrypted picture before the determined merging node, and adding the byte stream of the encrypted picture in reverse order.

B16. The device according to any one of B12-B15, further comprising:

The processing module is adapted to perform obfuscation processing on the encrypted picture before the first conversion module converts the encrypted picture into a byte stream, so as to increase the image filtering function of the encrypted picture.

B17. The device according to any one of B12-B16, wherein the first acquisition module is further adapted to: acquire the original picture to be uploaded to the cloud album from the terminal's album;

The device also includes an upload module adapted to upload the target picture to the cloud album after the encryption module generates the target picture.

B18. The device according to any one of B12-B17, wherein each byte stream exists in the form of a byte array.

B19. A device for decrypting pictures, comprising:

The second obtaining module is suitable for obtaining the picture to be decrypted;

The second conversion module is adapted to convert the picture to be decrypted into a byte stream, wherein the byte stream of the picture to be decrypted is based on the byte format of the picture, merging the original picture and used to process the original picture Obtained from the byte stream of the encrypted image processed by encryption;

The decryption module is adapted to extract the byte stream of the original picture from the byte stream of the picture to be decrypted according to the byte format of the picture, and generate the original picture.

B20. The device according to B19, wherein the decryption module is further adapted to:

The byte stream of the original picture is extracted from the byte stream of the picture to be decrypted by using the start mark or the end mark in the byte stream of the picture to be decrypted as an extraction point.

B21. The device according to B20, wherein the decryption module is further adapted to:

In the process of reading the byte stream of the picture to be decrypted, recording the appearance of the start marker in the byte stream of the picture to be decrypted;

Determining the first specified number of start markers as the extraction point, and using the byte stream including the extraction point and after the extraction point as the byte stream of the original picture.

B22. The device according to B20, wherein the decryption module is further adapted to:

During the process of reading the byte stream of the picture to be decrypted, recording the occurrence of the end marker in the byte stream of the picture to be decrypted;

Determining the second specified number of end markers as extraction points, and using the byte stream after the extraction point as the byte stream of the original picture.

Claims (22)

1. a kind of method of image ciphering, including：

Obtain original image and the encryption picture for the original image to be encrypted；

The original image and the encryption picture are converted into byte stream respectively；

Merge the byte stream of the original image and the encryption picture according to the byte format of picture, obtain the word of Target Photo Throttling, and generate the Target Photo.

2. the method according to claim 11, wherein, it is described that the original image and institute are merged according to the byte format of picture The byte stream of encryption picture is stated, including：

Saved respectively using the beginning label in the byte stream of the original image and the encryption picture or end mark as merging Point, processing is merged to the byte stream of the original image and the encryption picture.

3. the method according to claim 11, wherein, respectively with the byte stream of the original image and the encryption picture Beginning label or end mark as merge node, the byte stream of the original image and the encryption picture is merged Processing, including：

It is determined that merge node is used as using the end mark in the byte stream of the encryption picture；

Obtain the beginning label in the byte stream of the original image；

After the beginning label of the original image is arranged at into the merge node of determination, and order adds the original graph The byte stream of piece.

4. the method according to claim 11, wherein, respectively with the byte stream of the original image and the encryption picture Beginning label or end mark as merge node, the byte stream of the original image and the encryption picture is merged Processing, including：

It is determined that merge node is used as using the beginning label in the byte stream of the original image；

Obtain the end mark in the byte stream of the encryption picture；

Before the end mark of the encryption picture is arranged at into the merge node of determination, and the backward addition encryption figure The byte stream of piece.

5. according to the method described in claim any one of 1-4, wherein, before the encryption picture is converted into byte stream, Also include：

Fuzzy processing is carried out to the encryption picture, to increase the image filtering function of the encryption picture.

6. according to the method described in claim any one of 1-4, wherein, the acquisition original image, including：From the photograph album of terminal Middle acquisition will be uploaded to the original image of cloud photograph album；

After the Target Photo is generated, methods described also includes：The Target Photo is uploaded to the cloud photograph album.

7. according to the method described in claim any one of 1-4, wherein, each byte stream exists in the form of byte arrays.

8. a kind of method of picture decryption, including：

Picture to be decrypted is obtained, and the picture to be decrypted is converted into byte stream, wherein, the byte stream of the picture to be decrypted It is the byte format according to picture, merges original image and the encryption picture for the original image to be encrypted What byte stream obtained；

According to the byte format of the picture, the byte of the original image is extracted from the byte stream of the picture to be decrypted Stream, and generate the original image.

9. the method according to claim 11, wherein, according to the byte format of the picture, from the picture to be decrypted The byte stream of the original image is extracted in byte stream, including：

Using the beginning label in the byte stream of the picture to be decrypted or end mark as extraction point, from the picture to be decrypted Byte stream in extract the byte stream of the original image.

10. according to the method for claim 9, wherein, using the beginning label in the byte stream of the picture to be decrypted as Point is extracted, the byte stream of the original image is extracted from the byte stream of the picture to be decrypted, including：

During the byte stream of the picture to be decrypted is read, record and start to mark in the byte stream of the picture to be decrypted The appearance situation of note；

Determine that the first specified quantity beginning label as extraction point, will include the byte after the extraction point and the extraction point Flow the byte stream as the original image.

11. according to the method for claim 9, wherein, using the end mark in the byte stream of the picture to be decrypted as Point is extracted, the byte stream of the original image is extracted from the byte stream of the picture to be decrypted, including：

During the byte stream of the picture to be decrypted is read, the end mark in the byte stream of the picture to be decrypted is recorded The appearance situation of note；

The second specified quantity end mark is determined as extraction point, using the byte stream after the extraction point as the original graph The byte stream of piece.

12. a kind of device of image ciphering, including：

First acquisition module, suitable for obtaining original image and the encryption figure for the original image to be encrypted Piece；

First modular converter, suitable for the original image and the encryption picture are converted into byte stream respectively；

Encrypting module, suitable for merging the byte stream of the original image and the encryption picture according to the byte format of picture, obtain To the byte stream of Target Photo, and generate the Target Photo.

13. device according to claim 12, wherein, the encrypting module is further adapted for：

Saved respectively using the beginning label in the byte stream of the original image and the encryption picture or end mark as merging Point, processing is merged to the byte stream of the original image and the encryption picture.

14. device according to claim 13, wherein, the encrypting module is further adapted for：

It is determined that merge node is used as using the end mark in the byte stream of the encryption picture；

Obtain the beginning label in the byte stream of the original image；

After the beginning label of the original image is arranged at into the merge node of determination, and order adds the original graph The byte stream of piece.

15. device according to claim 13, wherein, the encrypting module is further adapted for：

It is determined that merge node is used as using the beginning label in the byte stream of the original image；

Obtain the end mark in the byte stream of the encryption picture；

Before the end mark of the encryption picture is arranged at into the merge node of determination, and the backward addition encryption figure The byte stream of piece.

16. according to the device described in claim any one of 12-15, wherein, in addition to：

Processing module, suitable for first modular converter by it is described encryption picture be converted into byte stream before, to the encryption Picture carries out Fuzzy processing, to increase the image filtering function of the encryption picture.

17. according to the device described in claim any one of 12-15, wherein, first acquisition module is further adapted for：From terminal The original image of cloud photograph album will be uploaded to by being obtained in photograph album；

Described device also includes uploading module, after generating the Target Photo in the encrypting module, by the target Picture is uploaded to the cloud photograph album.

18. according to the device described in claim any one of 12-15, wherein, each byte stream exists in the form of byte arrays.

19. a kind of device of picture decryption, including：

Second acquisition module, suitable for obtaining picture to be decrypted；

Second modular converter, suitable for the picture to be decrypted is converted into byte stream, wherein, the byte stream of the picture to be decrypted It is the byte format according to picture, merges original image and the encryption picture for the original image to be encrypted What byte stream obtained；

Deciphering module, suitable for the byte format according to the picture, the original is extracted from the byte stream of the picture to be decrypted The byte stream of beginning picture, and generate the original image.

20. device according to claim 19, wherein, the deciphering module is further adapted for：

Using the beginning label in the byte stream of the picture to be decrypted or end mark as extraction point, from the picture to be decrypted Byte stream in extract the byte stream of the original image.

21. device according to claim 20, wherein, the deciphering module is further adapted for：

During the byte stream of the picture to be decrypted is read, record and start to mark in the byte stream of the picture to be decrypted The appearance situation of note；

Determine that the first specified quantity beginning label as extraction point, will include the byte after the extraction point and the extraction point Flow the byte stream as the original image.

22. device according to claim 20, wherein, the deciphering module is further adapted for：

During the byte stream of the picture to be decrypted is read, the end mark in the byte stream of the picture to be decrypted is recorded The appearance situation of note；

The second specified quantity end mark is determined as extraction point, using the byte stream after the extraction point as the original graph The byte stream of piece.