TWI650672B - Authentication method of electronic document - Google Patents

Abstract

An electronic file verification method is implemented by a processing unit and includes the following steps: converting an electronic file into a first image; converting a person information into at least one second image; and calculating the at least one second image according to a predetermined program Performing image processing to generate at least one third image; performing an arithmetic process on the first image and the at least one third image to generate a final image. The final image may be restored by the other processing unit according to the personal information, the predetermined program, and the computing process to generate the first image, thereby obtaining the electronic file. Compared with the conventional watermarking method, the verification method has better advantages in terms of integrity, readability, de-identification, authenticity identification and the like of the electronic file.

Description

Electronic file verification method

The invention relates to a verification method, in particular to a verification method of an electronic file.

An electronic signature is a person who is attached to and associated with an electronic document and is used to identify and confirm the identity, eligibility, and authenticity of the electronic document. According to the provisions of the Electronic Signature Law, those who should be in writing, if their contents can be fully presented, can be taken out for inspection in the future, and the electronic documents can be obtained with the consent of the relative person. A known electronic file is a method of verifying encryption and decryption using a watermark, so that the relevant person can view the content of the electronic file or attach the content of the watermark according to the authority.

The electronic file using the watermark for verification has the following characteristics: in terms of the integrity of the file, the content of the electronic file is still intact; in terms of the readability of the file, the content of the electronic file or the additional watermark can be viewed according to the authority. The content of the file; in the case of file recognition, the small-area image overlay with the watermark text can still view the content of the electronic file; for the authenticity identification of the file, this function is not available; In fact, the same file but the electronic file and the watermark are stored in different locations; in the case of the removal of the additional data, the watermark data is removed according to the authority.

Accordingly, it is an object of the present invention to provide a method of verifying an electronic document that has more advantages and is more secure than conventional watermarking methods.

Therefore, the verification method of the electronic file of the present invention is applied to a first processing unit and includes the following steps (a) to (d).

Step (a): converting an electronic file into a first image; and (b) converting a person information into at least one second image; and (c): performing image processing on the at least one second image according to a predetermined program Correspondingly generating at least one third image; and step (d): performing an arithmetic process on the first image and the at least one third image to generate a final image.

In some implementations, the first image and the at least one second image comprise at least one of a text and a picture.

In some implementations, wherein, in the step (b), the personal information includes a unified ID number, an e-mail address, a telephone number, an electronic device identification number, a specified piece of text, and a specified image corresponding to a user. At least one of them.

In some implementations, wherein in step (c), the predetermined program includes image processing of at least one of rotation, mirroring, overlapping, cropping, segmenting, translating, and zooming.

In some implementations, wherein in step (d), the operational process is a predetermined algorithm.

In some implementations, wherein in step (d), the predetermined algorithm is an exclusive OR (XOR) logical operation.

In other implementations, the verification method is further applicable to a second processing unit, and further includes the step (e): receiving, by the second processing unit, the final image and the personal information, and then according to the predetermined program And the computing process, the final image is restored to generate the first image, and the electronic file is obtained.

The effect of the present invention is that the at least one second image converted into the personal information by a processing unit is subjected to image processing via the predetermined program, and then the operation processing is performed on the first image converted by the electronic file. The final image is generated, so that another processing unit can restore the final image to generate the first image according to the final image, the personal information, the predetermined program, and the operation processing, thereby obtaining the electronic file. Compared with the conventional watermarking method, the verification method has better advantages in terms of integrity, readability, de-identification, authenticity identification and the like of the electronic file.

1‧‧‧ first image

21~23‧‧‧Second image

21'~23'‧‧‧ third image

4‧‧‧ final image

S1~S5‧‧‧Steps

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a flowchart illustrating an implementation of the method for verifying an electronic document of the present invention. 2 is a schematic diagram, and FIG. 1 is a schematic view showing a first image and three second images of the embodiment; and FIG. 3 is a schematic view, and FIG. 3 is a schematic view showing three third images of the embodiment. And a final image.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1, an embodiment of a method for verifying an electronic file according to the present invention is applicable to a first processing unit and a second processing unit, and includes steps S1 to S5. The first processing unit and the second processing unit may be a computer device or an arithmetic chip, but not limited thereto.

Referring to FIG. 1 and FIG. 2, in step S1, the first processing unit converts an electronic file into a first image 1, the first image 1 containing the content of the electronic file, and the content of the electronic file is related to at least one use. For example, a user's bill. In this embodiment, the first image 1 includes characters (as shown by the horizontal lines in FIG. 2) and pictures (as shown in the picture in FIG. 2), and in other embodiments, the first image 1 is also You can include only text or images, or include embedded animations.

In step S2, the first processing unit converts one person information into at least one The second image 21 to 23, and the first image 1 and the at least one second image 21 to 23 have the same number of pixels, for example, 800*600, but not limited thereto. The personal information includes at least one of a uniform number of the identity card corresponding to the user, an e-mail address, a telephone number, an electronic device identification number, a designated piece of text, and a designated image. In this embodiment, there are three second images 21 to 23, and the second image 21 includes characters and is converted by a phone number corresponding to the user's identity card, an electronic mail box, and a phone number of the mobile phone. The second image 22 contains text and is converted from the electronic device identification number corresponding to the user and the specified segment of text. The second image 23 contains only pictures and is converted from images corresponding to the user. In other embodiments, the second images 21 to 23 may also include characters and pictures, but not limited thereto.

In step S3, the first processing unit performs image processing on the at least one second image 21~23 according to a predetermined program to correspondingly generate at least one third image 21'-23'. The predetermined program includes image processing of at least one of rotation, mirroring, overlapping, cropping, splitting, panning, and zooming. Referring to FIG. 3 again, the three second images 21 to 23 are exemplarily illustrated to rotate at different angles to correspondingly generate three third images 21' to 23'.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , in step S4 , the first processing unit performs an operation process on the first image 1 and the at least one third image 21 ′ 23′ to generate a final image 4 . The operation process is a predetermined algorithm, in the embodiment, the reservation The algorithm is a Exclusive OR (XOR) logic operation, which is represented by a symbol of "+" in FIG. 3, that is, the first processing unit compares the first image 1 and the third image. The display values of 21'~23' at the same pixel position are XORed to generate the final image 4. It should be particularly noted that in the embodiment, the first image 1 and each of the second images 21 to 23 have the same number of pixels, and in other embodiments, each of the second images 21 to 23 and the The first image 1 may have a different number of pixels, and in step S3, after the second image 21~23 is scaled, the generated third image 21'~23' has the same number as the first image 1. The pixel is processed, and the arithmetic processing of step S4 can be performed. In addition, the first image 1, each of the second images 21 to 23, each of the third images 21' to 23', and the final image may be, for example, jpg, pdf, word, etc., for viewing by a user. Files are not limited to image files.

In step S5, the final image 4 and the personal information may be encrypted and then transmitted to an electronic device (equivalent to the second processing unit) of the user via a network or other different pipeline, so that the use After receiving the final image 4 and the personal information, the second processing unit restores the final image 4 to generate the first image 1 according to the predetermined program and the arithmetic processing, thereby obtaining the electronic file. It should be additionally noted that the predetermined program and the operation processing may be preset and stored in the first processing unit and the second processing unit, respectively, or the predetermined program and the operation processing may be like the final image 4 And the personal information is encrypted and transmitted to the electronic device of the user via a network or other different pipeline.

In summary, the final image encrypted by the verification method is compared with the conventional watermarking method, and the content of the electronic file is destroyed in the integrity of the file; in the readability of the file It is said that other users have been unable to directly view the contents of electronic documents; in the case of de-identification of documents, large-area image merging with personal information makes it impossible to directly view the contents of electronic documents; Personal information can be restored without electronic files; in the case of additional data storage, electronic documents have been merged into the same file with personal information; in the case of removal of additional information, electronic information is returned with personal information. The verification method not only has better advantages in various aspects than the conventional watermarking method, but also improves the security of the electronic file, so that the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

Claims (7)

A method for verifying an electronic file is implemented by a first processing unit and includes the following steps: (a) converting a readable electronic file into a first image; (b) converting a person information into at least one a second image; (c) performing image processing on the at least one second image according to a predetermined program to generate at least one third image; and (d) performing an operation process on the first image and the at least one third image To produce a final image that is not readable. The method for verifying an electronic file according to claim 1, wherein the first image and the at least one second image comprise at least one of a text and a picture. The method for verifying an electronic file according to claim 2, wherein in step (b), the personal information includes a uniform number of the identity card corresponding to a user, an electronic mail box, a telephone number, an electronic device identification number, and a designated period. At least one of text, and a specified image. The method for verifying an electronic file according to claim 1, wherein in the step (c), the predetermined program includes image processing of at least one of rotation, mirroring, overlapping, cropping, splitting, panning, and zooming. The verification method of the electronic file according to claim 1, wherein in the step (d), the operation processing is a predetermined algorithm. The method for verifying an electronic file according to claim 5, wherein in the step (d), the predetermined algorithm is an exclusive OR (XOR) logical operation. The method for verifying an electronic file as claimed in claim 1 is also applicable to a second Processing unit, and further comprising step (e), the second processing unit receives the final image and the personal information, and then restores the non-readable final image according to the predetermined program and the operation processing The first image is generated to obtain the readable electronic file.