CN103400082A - File encryption/decryption method and system - Google Patents
File encryption/decryption method and system Download PDFInfo
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- CN103400082A CN103400082A CN2013103595349A CN201310359534A CN103400082A CN 103400082 A CN103400082 A CN 103400082A CN 2013103595349 A CN2013103595349 A CN 2013103595349A CN 201310359534 A CN201310359534 A CN 201310359534A CN 103400082 A CN103400082 A CN 103400082A
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000001815 facial effect Effects 0.000 claims description 176
- 230000009471 action Effects 0.000 claims description 15
- 230000013011 mating Effects 0.000 claims description 8
- 238000012790 confirmation Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 210000004709 eyebrow Anatomy 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 239000012467 final product Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
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Abstract
The invention discloses a file encryption/decryption method and a file encryption/decryption system. The file encryption method comprises the steps as follows: receiving a file encryption instruction sent by a user; judging whether pre-stored face characteristic information corresponding to the user exists in a face characteristic database, and obtaining a first judgment result; adopting the pre-stored face characteristic information to encrypt files when the first judgment result is yes; acquiring the instant face characteristic information of the user when the first judgment result is no; encrypting the files by adopting the instant face characteristic information. Due to the adoption of the method or the system, the files can be encrypted or decrypted according to the user's face characteristic, so that a risk of code leakage is avoided, and the safety of the encrypted files is improved.
Description
Technical field
The application relates to data processing field, particularly a kind of file encrypting method, decryption method and system.
Background technology
Along with the development of Information technology, individual's privacy file is more and more, photo as individual as some, individual document, individual's video recording recording etc.; Generally speaking, the privacy file in the present invention does not want with regard to referring to the file that allows user self people in addition view.
In prior art, for the privacy file, usually can be encrypted it.The method of encrypting is mainly by the user, password to be set file is encrypted.During follow-up file after opening this encryption, need the corresponding password of input.
But file encrypting method of the prior art, after password is revealed or cracked, hold any of this password and can open this document per capita., still there is the risk that is viewed by other users in the file that this makes after file encrypting method of the prior art is encrypted.
Summary of the invention
The purpose of this invention is to provide a kind of file encrypting method, decryption method and system, can to file, be encrypted or decipher according to user's facial characteristics, thus the risk of avoiding password to be revealed, the security after the raising file encryption.
For achieving the above object, the invention provides following scheme:
A kind of file encrypting method comprises:
The instruction of the encrypt file that the reception user sends;
Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result;
Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
When described first, when the determination result is NO, gather described user's instant facial characteristics information;
Adopt described instant facial characteristics information to be encrypted described file.
Optionally, the described user's of described collection instant facial characteristics information comprises:
Obtain user's face-image;
When receiving the user to the confirmation information of described face-image, described face-image is carried out to the face zone and divide;
Gather respectively the corresponding face characteristic information of regional.
Optionally, the described instant facial characteristics information of described employing is encrypted described file, comprising:
Choose at least two face characteristic informations that zone is corresponding;
At least two described face characteristic informations, as encryption identification, are encrypted described file.
A kind of file decryption method comprises:
Receive the OPEN of user to encrypt file;
Obtain described user's facial image information;
From described facial image information, extracting facial characteristics information;
Facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated;
Judge whether that the match is successful, obtain the first judged result;
Judgment result is that and show the content in described encrypt file while being when described first;
Wherein, the cipher mode of described encrypt file comprises: the instruction of the encrypt file that the reception user sends; Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result; Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first; When described first, when the determination result is NO, gather described user's instant facial characteristics information; Adopt described instant facial characteristics information to be encrypted described file.
Optionally, described using in described facial characteristics information and described encrypt file before the facial characteristics information of encryption identification is mated, also comprise:
The prompting user carries out action nictation;
According to described user's facial characteristics information, judge that whether described user has carried out action nictation, obtains the second judged result;
Judgment result is that while being when described second, carry out the step of mating as the facial characteristics information of encryption identification in described facial characteristics information and described encrypt file.
A kind of file encryption system comprises:
The encrypted instruction receiving element, be used to receiving the instruction of the encrypt file that the user sends;
Whether the first judging unit, exist the prestore facial characteristics information corresponding with described user for judging facial feature database, obtains the first judged result;
The first ciphering unit, for judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
Instant facial characteristics information acquisition unit, for when described first when the determination result is NO, the described user's of collection instant facial characteristics information;
The second ciphering unit, be encrypted described file be used to adopting described instant facial characteristics information.
Optionally, described instant facial characteristics information acquisition unit comprises:
Face-image obtains subelement, be used to obtaining user's face-image;
Subelement is divided in face zones, for when receiving the user to the confirmation information of described face-image, described face-image is carried out to the division of face zone;
The face characteristic information gathers subelement, for gathering respectively the corresponding face characteristic information of regional.
Optionally, described the second ciphering unit comprises:
The face characteristic information is chosen subelement, be used to choosing at least two face characteristic informations that zone is corresponding;
Encrypt subelement, for by at least two described face characteristic informations as encryption identification, described file is encrypted.
A kind of file decryption system comprises:
The OPEN receiving element, be used to receiving the OPEN of user to encrypt file;
The facial image information acquiring unit, be used to obtaining described user's facial image information;
The facial characteristics information extraction unit, for extracting facial characteristics information from described facial image information;
Matching unit, for mating described facial characteristics information and described encrypt file as the facial characteristics information of encryption identification;
The first judging unit, be used to judging whether that the match is successful, obtain the first judged result;
Content display unit, for judgment result is that and show the content in described encrypt file while being when described first;
Wherein, the cipher mode of described encrypt file comprises: the instruction of the encrypt file that the reception user sends; Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result; Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first; When described first, when the determination result is NO, gather described user's instant facial characteristics information; Adopt described instant facial characteristics information to be encrypted described file.
Optionally, also comprise:
Tip element, for using described facial characteristics information and described encrypt file before the facial characteristics information of encryption identification is mated, the prompting user carries out action nictation;
The second judging unit, for the facial characteristics information according to described user, judge that whether described user has carried out action nictation, obtains the second judged result;
Control module, for judgment result is that while being when described second, control described matching unit and carry out the step of mating as the facial characteristics information of encryption identification in described facial characteristics information and described encrypt file.
According to specific embodiment provided by the invention, the invention discloses following technique effect:
The file encrypting method of the embodiment of the present invention and system, by judging in facial feature database whether have the prestore facial characteristics information corresponding with the user, if exist, adopt this facial characteristics information that prestores to be encrypted the file of user's appointment; If there is no, gather described user's instant facial characteristics information, adopt described instant facial characteristics information to be encrypted described file; Thereby can to file, be encrypted according to user's facial characteristics the risk of avoiding password to be revealed, the security after the raising file encryption.
The file decryption method and system of the embodiment of the present invention, by obtaining described user's facial image information; From described facial image information, extracting facial characteristics information; Facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated; When the match is successful, show the content in described encrypt file, can to file, be decrypted according to user's facial characteristics the risk of avoiding password to be revealed, the security after the raising file encryption.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the process flow diagram of file encrypting method embodiment 1 of the present invention;
Fig. 2 is the process flow diagram of file encrypting method embodiment 2 of the present invention;
Fig. 3 is the process flow diagram of file decryption embodiment of the method 1 of the present invention;
Fig. 4 is the process flow diagram of file decryption embodiment of the method 2 of the present invention;
Fig. 5 is the structural drawing of file encryption system embodiment of the present invention;
Fig. 6 is the structural drawing of file decryption system embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment that obtains, belong to the scope of protection of the invention.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is the process flow diagram of file encrypting method embodiment 1 of the present invention.As shown in Figure 1, described method can comprise:
Step 101: the instruction of the encrypt file that the reception user sends;
File in this step can be various types of files.Word document for example, excel form, txt document etc.
The user can be by the encryption button in actions menu, the instruction of sending encrypt file.
Step 102: judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result;
The user, when login of operating system, can require the user to input subscriber identity information.Subscriber identity information corresponding to different users is different.Can require in advance the user to input the facial image information of self.From this facial image information, extracting facial characteristics information, and deposit database in, as the facial characteristics information that prestores.
Step 103: judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
In this step, if the user has been input to the facial image information of self in system in advance, in database, just store this user's facial characteristics information.At this moment, can directly adopt the facial characteristics information that prestores to be encrypted described file.
Step 104: when the determination result is NO, gather described user's instant facial characteristics information when described first;
Can obtain by camera user's instant face-image.Again from described instant face-image, extracting this user's facial characteristics information.
Step 105: adopt described instant facial characteristics information to be encrypted described file.
Described instant facial characteristics information can be associated with described file.Follow-up when the file that has after the user accesses this encryption, can obtain visitor's facial characteristics information, the facial characteristics information that again visitor's image feature information is associated with described file is complementary, if the match is successful, determines that the visitor has the access rights to this document.
In the present embodiment, by judging in facial feature database whether have the prestore facial characteristics information corresponding with the user, if exist, adopt this facial characteristics information that prestores to be encrypted the file of user's appointment; If there is no, gather described user's instant facial characteristics information, adopt described instant facial characteristics information to be encrypted described file; Thereby can to file, be encrypted according to user's facial characteristics the risk of avoiding password to be revealed, the security after the raising file encryption.
Fig. 2 is the process flow diagram of file encrypting method embodiment 2 of the present invention.As shown in Figure 2, described method can comprise:
Step 201: the instruction of the encrypt file that the reception user sends;
Step 202: judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result;
Step 203: judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
Step 204: when the determination result is NO, obtain user's face-image when described first;
The user's who gets face-image, can show on display unit.
Step 205: when receiving the user to the confirmation information of described face-image, described face-image is carried out to the face zone and divide;
The user can, according to the image that shows on display unit, judge voluntarily whether the face-image that gets is complete, clear.If the face-image that gets is complete, clearly, the user can input validation information; If the face-image that gets is sufficiently complete, clear, the user can adjust angle or the position that image acquisition unit obtains image, again obtains face-image.
Each position (comprising volume, two eyebrow, binocular, nose, cheeks, lip, tooth and lower chin) of face general reference face, especially important with five positions such as two eyebrows, binocular, nose, cheeks (being cheeks) and lips.
Can, according to default model or algorithm, described face-image be carried out to the face zone and divide.For example, respectively the zone at eyebrow, order, nose, cheek and lip place is divided out separately, become face zone one by one.
Step 206: gather respectively the corresponding face characteristic information of regional.
The face characteristic information can comprise the information such as size, shape, position.Concrete, take nose as example, its face characteristic information can comprise the shape (for example flat or Gao Ting) of nose, size, and even whether position, have thick feature pore, and the position of these feature pores etc.
Step 207: adopt described face characteristic information to be encrypted described file.
Concrete, adopt described instant facial characteristics information to be encrypted described file, can comprise the following steps:
Choose at least two face characteristic informations that zone is corresponding;
At least two described face characteristic informations, as encryption identification, are encrypted described file.
Because while adopting a face characteristic information corresponding to zone to be encrypted described file, security is not high enough, likely exist other to have the special user of identical face feature, may exist the special user who does not meet browse right can open the situation of encrypt file by chance, so choose at least two face characteristic informations corresponding to zone, be encrypted, can improve the security of the file after encryption.
The invention also discloses a kind of file decryption method.Fig. 3 is the process flow diagram of file decryption embodiment of the method 1 of the present invention.As shown in Figure 3, the method can comprise:
Step 301: receive the OPEN of user to encrypt file;
For example, the user can double-click described encrypt file by mouse, thus the OPEN of sending.
Step 302: the facial image information of obtaining described user;
Step 303: from extracting facial characteristics information described facial image information;
Extracting the process of facial characteristics information, can be specifically face-image to be carried out to the face zone divide; Gather respectively the corresponding face characteristic information of regional.
Step 304: the facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated;
Concrete, the facial characteristics information as encryption identification in the characteristic information of the regional of eyebrow, order, nose, cheek and lip and described encrypt file can be mated.
Step 305: judge whether that the match is successful, obtain the first judged result;
If the characteristic information of the regional of eyebrow, order, nose, cheek and lip, all with in described encrypt file, the match is successful as the facial characteristics information (characteristic information that also comprises the regional of eyebrow, order, nose, cheek and lip) of encryption identification, think the whole matching success.
Step 306: judgment result is that and show the content in described encrypt file while being when described first.
After showing the content in described encrypt file, can also allow the user described encrypt file to be carried out to the operations such as modification or editor.
In the present embodiment, by obtaining described user's facial image information; From described facial image information, extracting facial characteristics information; Facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated; When the match is successful, show the content in described encrypt file, can to file, be decrypted according to user's facial characteristics the risk of avoiding password to be revealed, the security after the raising file encryption.
Fig. 4 is the process flow diagram of file decryption embodiment of the method 2 of the present invention.As shown in Figure 4, the method can comprise:
Step 401: receive the OPEN of user to encrypt file;
Step 402: the facial image information of obtaining described user;
Step 403: from extracting facial characteristics information described facial image information;
Step 404: the prompting user carries out action nictation;
Step 405: according to described user's facial characteristics information, judge that whether described user has carried out action nictation, obtains the second judged result;
When the user blinked, the characteristics of image in zone at eye place can change, the size of eyes for example, and bright-dark degree all can change.Can, according to above-mentioned variation, judge whether described user has carried out action nictation.
Step 406: judgment result is that and the facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated while being when described second;
Step 407: judge whether that the match is successful, obtain the first judged result;
Step 408: judgment result is that and show the content in described encrypt file while being when described first.
In the present embodiment, before carrying out the facial characteristics information matches, first judge whether to detect user's action nictation, can guarantee that the face-image that gets is user's dynamic image, prevent that malicious user from adopting actual encrypted user's static images to be decrypted described encrypt file, further improves the security of deciphering.
The present invention also provides a kind of file encryption system.Fig. 5 is the structural drawing of file encryption system embodiment of the present invention.As shown in Figure 5, this system can comprise:
Encrypted instruction receiving element 501, be used to receiving the instruction of the encrypt file that the user sends;
Whether the first judging unit 502, exist the prestore facial characteristics information corresponding with described user for judging facial feature database, obtains the first judged result;
The first ciphering unit 503, for judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
Instant facial characteristics information acquisition unit 504, for when described first when the determination result is NO, the described user's of collection instant facial characteristics information;
The second ciphering unit 505, be encrypted described file be used to adopting described instant facial characteristics information.
In practical application, described instant facial characteristics information acquisition unit 504 can comprise:
Face-image obtains subelement, be used to obtaining user's face-image;
Subelement is divided in face zones, for when receiving the user to the confirmation information of described face-image, described face-image is carried out to the division of face zone;
The face characteristic information gathers subelement, for gathering respectively the corresponding face characteristic information of regional.
Described the second ciphering unit 505 can comprise:
The face characteristic information is chosen subelement, be used to choosing at least two face characteristic informations that zone is corresponding;
Encrypt subelement, for by at least two described face characteristic informations as encryption identification, described file is encrypted.
The present invention also provides a kind of file decryption system.Fig. 6 is the structural drawing of file decryption system embodiment of the present invention.As shown in Figure 6, this system can comprise:
Facial image information acquiring unit 602, be used to obtaining described user's facial image information;
Facial characteristics information extraction unit 603, for extracting facial characteristics information from described facial image information;
The first judging unit 605, be used to judging whether that the match is successful, obtain the first judged result;
Wherein, the cipher mode of described encrypt file comprises: the instruction of the encrypt file that the reception user sends; Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result; Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first; When described first, when the determination result is NO, gather described user's instant facial characteristics information; Adopt described instant facial characteristics information to be encrypted described file.
In practical application, this system can also comprise:
Tip element, for using described facial characteristics information and described encrypt file before the facial characteristics information of encryption identification is mated, the prompting user carries out action nictation;
The second judging unit, for the facial characteristics information according to described user, judge that whether described user has carried out action nictation, obtains the second judged result;
Control module, for judgment result is that while being when described second, control described matching unit and carry out the step of mating as the facial characteristics information of encryption identification in described facial characteristics information and described encrypt file.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.For the disclosed system of embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part partly illustrates and gets final product referring to method.
Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just be used to helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications.In sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. a file encrypting method, is characterized in that, comprising:
The instruction of the encrypt file that the reception user sends;
Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result;
Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
When described first, when the determination result is NO, gather described user's instant facial characteristics information;
Adopt described instant facial characteristics information to be encrypted described file.
2. method according to claim 1, is characterized in that, the described user's of described collection instant facial characteristics information comprises:
Obtain user's face-image;
When receiving the user to the confirmation information of described face-image, described face-image is carried out to the face zone and divide;
Gather respectively the corresponding face characteristic information of regional.
3. method according to claim 2, is characterized in that, the described instant facial characteristics information of described employing is encrypted described file, comprising:
Choose at least two face characteristic informations that zone is corresponding;
At least two described face characteristic informations, as encryption identification, are encrypted described file.
4. a file decryption method, is characterized in that, comprising:
Receive the OPEN of user to encrypt file;
Obtain described user's facial image information;
From described facial image information, extracting facial characteristics information;
Facial characteristics information as encryption identification in described facial characteristics information and described encrypt file is mated;
Judge whether that the match is successful, obtain the first judged result;
Judgment result is that and show the content in described encrypt file while being when described first;
Wherein, the cipher mode of described encrypt file comprises: the instruction of the encrypt file that the reception user sends; Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result; Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first; When described first, when the determination result is NO, gather described user's instant facial characteristics information; Adopt described instant facial characteristics information to be encrypted described file.
5. method according to claim 4, is characterized in that, described using in described facial characteristics information and described encrypt file before the facial characteristics information of encryption identification is mated, also comprise:
The prompting user carries out action nictation;
According to described user's facial characteristics information, judge that whether described user has carried out action nictation, obtains the second judged result;
Judgment result is that while being when described second, carry out the step of mating as the facial characteristics information of encryption identification in described facial characteristics information and described encrypt file.
6. a file encryption system, is characterized in that, comprising:
The encrypted instruction receiving element, be used to receiving the instruction of the encrypt file that the user sends;
Whether the first judging unit, exist the prestore facial characteristics information corresponding with described user for judging facial feature database, obtains the first judged result;
The first ciphering unit, for judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first;
Instant facial characteristics information acquisition unit, for when described first when the determination result is NO, the described user's of collection instant facial characteristics information;
The second ciphering unit, be encrypted described file be used to adopting described instant facial characteristics information.
7. system according to claim 6, is characterized in that, described instant facial characteristics information acquisition unit comprises:
Face-image obtains subelement, be used to obtaining user's face-image;
Subelement is divided in face zones, for when receiving the user to the confirmation information of described face-image, described face-image is carried out to the division of face zone;
The face characteristic information gathers subelement, for gathering respectively the corresponding face characteristic information of regional.
8. system according to claim 7, is characterized in that, described the second ciphering unit comprises:
The face characteristic information is chosen subelement, be used to choosing at least two face characteristic informations that zone is corresponding;
Encrypt subelement, for by at least two described face characteristic informations as encryption identification, described file is encrypted.
9. a file decryption system, is characterized in that, comprising:
The OPEN receiving element, be used to receiving the OPEN of user to encrypt file;
The facial image information acquiring unit, be used to obtaining described user's facial image information;
The facial characteristics information extraction unit, for extracting facial characteristics information from described facial image information;
Matching unit, for mating described facial characteristics information and described encrypt file as the facial characteristics information of encryption identification;
The first judging unit, be used to judging whether that the match is successful, obtain the first judged result;
Content display unit, for judgment result is that and show the content in described encrypt file while being when described first;
Wherein, the cipher mode of described encrypt file comprises: the instruction of the encrypt file that the reception user sends; Judge in facial feature database and whether have the prestore facial characteristics information corresponding with described user, obtain the first judged result; Judgment result is that and adopt the described facial characteristics information that prestores to be encrypted described file while being when described first; When described first, when the determination result is NO, gather described user's instant facial characteristics information; Adopt described instant facial characteristics information to be encrypted described file.
10. system according to claim 9, is characterized in that, also comprises:
Tip element, for using described facial characteristics information and described encrypt file before the facial characteristics information of encryption identification is mated, the prompting user carries out action nictation;
The second judging unit, for the facial characteristics information according to described user, judge that whether described user has carried out action nictation, obtains the second judged result;
Control module, for judgment result is that while being when described second, control described matching unit and carry out the step of mating as the facial characteristics information of encryption identification in described facial characteristics information and described encrypt file.
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| CN2013103595349A CN103400082A (en) | 2013-08-16 | 2013-08-16 | File encryption/decryption method and system |
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| CN2013103595349A CN103400082A (en) | 2013-08-16 | 2013-08-16 | File encryption/decryption method and system |
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| CN105809060A (en) * | 2016-03-18 | 2016-07-27 | 联想(北京)有限公司 | Information processing method and apparatus as well as electronic device |
| CN109067799A (en) * | 2018-09-28 | 2018-12-21 | 歌尔科技有限公司 | Data transmission method, system and equipment |
| CN111414639A (en) * | 2019-01-07 | 2020-07-14 | 百度在线网络技术（北京）有限公司 | File encryption and decryption method, device and equipment |
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| CN110619228A (en) * | 2019-09-23 | 2019-12-27 | 珠海格力电器股份有限公司 | File decryption method, file encryption method, file management system and storage medium |
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