CN103220295A - Document encryption and decryption method, device and system - Google Patents
Document encryption and decryption method, device and system Download PDFInfo
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- CN103220295A CN103220295A CN2013101496601A CN201310149660A CN103220295A CN 103220295 A CN103220295 A CN 103220295A CN 2013101496601 A CN2013101496601 A CN 2013101496601A CN 201310149660 A CN201310149660 A CN 201310149660A CN 103220295 A CN103220295 A CN 103220295A
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Abstract
The invention discloses a document encryption and decryption method, device and system. The document encryption and decryption method comprises the steps of receiving an electronic document downloading request sent by a client side; generating an encryption secret key, encrypting file content corresponding to a document identifier by utilization of the encryption secret key, and generating an encrypted document; reading a stored user public key according to user information, and encrypting the encryption secret key to generate secret key information by utilization of the user public key; correspondingly storing the document identifier and the secret key information; and sending the encrypted document to the client side. An electronic document after being downloaded by a user is the encrypted document, the encryption secret key is obtained through the fact that a user private key in certificated equipment needs to be used for decrypting the secret key information stored in a server, and then the encryption secret key is used for decrypting the encrypted document to obtain the electronic document. Even the encrypted document after being downloaded is divulged, due to the fact that the certificated equipment is unavailable to be connected to the server to conduct decryption on the downloaded encrypted document, the content of the electronic document can not be read, and due to the fact that the electronic document is stored in an internal memory and can not be copied directly, safety performance is high.
Description
Technical field
The present invention relates to field of information security technology, particularly relate to the methods, devices and systems of a kind of file encryption and deciphering.
Background technology
This part is intended to provide background or context for the embodiments of the present invention of stating in claims.Description herein can comprise the notion that can probe into, but the notion of having expected or having probed into not necessarily.Therefore, unless point out at this, otherwise for the application's specification and claims, be not prior art in the content of describing in this part, and not because be included in just admit it is prior art in this part.
Along with the development of information technology, the storage mode of most data carries out the transition to electronic document gradually from original paper document.Electronic document is a carrier with chemical Physics of Magnetism materials such as computer disc, solid state hard disc, disk and CDs mainly, carries out access by computer system, and can carry out long-distance transmissions on communication network.Electronic document is compared with paper document, has memory space little, is easy to revise, and advantage such as be easy to carry.
Because characteristics such as electronic document is easy to duplicate, access and transmission,, when electronic document is revealed, can cause serious loss to the enterprise that holds of electronic document if what stored in the electronic document is the unshared data of enterprises.Therefore, the leakage that prevents the non-shared data that electronic document is stored becomes one of important technological problems of current concern.
At present, the mode that electronic document is revealed that prevents commonly used is, electronic document is kept at the server of enterprise, when the user need read or download electronic document, need send authentication request to the server of enterprise by the user, the server of enterprise can carry out the authentication of authority to the user, when the user has the authority of reading or downloading electronic document, allows the user to read or the download electronic document.
But, the above-mentioned method that prevents that electronic document from revealing, only the user is provided with access rights to electronic document, after the user of access rights downloads electronic document, can be with the electronic document after downloading to enterprise's external leakage, the user of other the server of not visiting enterprise also can see the data in the electronic document, and security performance is low.
Summary of the invention
In view of this, the invention provides the methods, devices and systems of a kind of file encryption and deciphering, utilize client public key that the encryption key of encrypting to electronic document is encrypted, improved the security performance of electronic document.
A kind of method of file encryption is applied to server, and described method comprises:
Receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification;
Generate encryption key, utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document;
Read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information;
With document identification and key information corresponding stored;
Encrypted document is sent to client.
Optionally, described method further comprises:
Carry out authentication according to described user profile, when the user has the authority of downloading document, carry out generating encryption key.
Optionally, described method further comprises:
Delete described encrypted document.
Optionally, described method further comprises:
Receive user's register requirement that client sends, described user's register requirement comprises user profile;
User profile is carried out authentication, when authentication is passed through, Random assignment client public key and private key for user;
With user profile and client public key corresponding stored;
Send the response of succeeding in registration to client, the described response of succeeding in registration comprises private key for user.
A kind of method of document deciphering is applied to client, and described method comprises:
The encrypted document that reception server sends;
Send key information request to server, described key information request comprises the document identification of described encrypted document;
The key information of the described document identification correspondence that reception server sends;
From certificate equipment, obtain private key for user, utilize private key for user to key information decipher encryption key;
Utilize encryption key that encrypted document is decrypted and obtain electronic document storage in internal memory.
Optionally, described method further comprises:
Utilize the reader that mates with electronic document type from internal memory, to read electronic document.
Optionally, described method further comprises:
Send user's register requirement to server, described user's register requirement comprises user profile;
The response of succeeding in registration that reception server sends, the described response of succeeding in registration comprises private key for user;
Private key for user is sent to the certificate device storage.
A kind of device of file encryption, described device comprises:
First receiving element is used to receive the electronic document download request that client sends, and described electronic document download request comprises user profile and document identification;
First ciphering unit is used to generate encryption key, utilizes encryption key that the pairing document content of described document identification is encrypted, and generates encrypted document;
Second ciphering unit is used for reading the client public key of being stored according to user profile, utilizes client public key that encryption keys is generated key information;
First memory cell is used for document identification and key information corresponding stored;
First transmitting element is used for encrypted document is sent to client.
Optionally, described device further comprises:
First authenticating unit is used for carrying out authentication according to described user profile, when the user has the authority of downloading document, carries out generating encryption key.
Optionally, described device further comprises:
Delete cells is used to delete described encrypted document.
Optionally, described device further comprises:
Second receiving element is used to receive user's register requirement that client sends, and described user's register requirement comprises user profile;
Second authenticating unit is used for user profile is carried out authentication, when authentication is passed through, and Random assignment client public key and private key for user;
Second memory cell is used for user profile and client public key corresponding stored;
Second transmitting element is used for sending the response of succeeding in registration to client, and the described response of succeeding in registration comprises private key for user.
A kind of device of document deciphering, described device comprises:
The 3rd receiving element is used for the encrypted document that reception server sends;
The 3rd transmitting element is used for sending key information request to server, and described key information request comprises the document identification of described encrypted document;
The 4th receiving element is used for the key information of the described document identification correspondence that reception server sends;
First decrypting device is used for obtaining private key for user from certificate equipment, utilize private key for user to key information decipher encryption key;
Second decrypting device is used to utilize encryption key that encrypted document is decrypted and obtains electronic document.
Optionally, described device further comprises:
Reading unit is used for utilizing the reader with the electronic document type coupling to read electronic document from internal memory.
Optionally, described device further comprises:
The 4th transmitting element is used for sending user's register requirement to server, and described user's register requirement comprises user profile;
The 5th receiving element is used for the response of succeeding in registration that reception server sends, and the described response of succeeding in registration comprises private key for user;
The 5th transmitting element is used for private key for user is sent to the certificate device storage.
The system of a kind of file encryption and deciphering, described system comprises:
The device of the device of file encryption of the present invention and document of the present invention deciphering.
As shown in the above, the present invention has following beneficial effect:
Receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification; Generate encryption key, utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document; Read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information; With document identification and key information corresponding stored; Encrypted document is sent to client, the electronic document that obtains after the user's download is an encrypted document, need the private key for user in the certificate of utility equipment that the key information deciphering of storing in the server is obtained encryption key, deciphering obtains electronic document to encrypted document to utilize encryption key again, because what user's download obtained is encrypted document, even the encrypted document after will downloading is revealed, because not having certificate equipment to be connected to server is decrypted the encrypted document after downloading, can't read the content in the electronic document, because electronic document storage is in the internal memory of the client of user's download, can not directly copy and electronic document be revealed the security performance height.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the method embodiment one flow process schematic diagram of a kind of file encryption of the present invention;
Fig. 2 is method embodiment two flow charts of a kind of file encryption of the present invention;
Fig. 3 is method embodiment three schematic flow sheets of a kind of document deciphering of the present invention;
Fig. 4 is method embodiment four schematic flow sheets of a kind of document deciphering of the present invention;
Fig. 5 is a kind of file encryption device of the present invention embodiment five structural representations;
Fig. 6 is a kind of document decryption device of the present invention embodiment five structural representations.
Embodiment
Below with reference to some illustrative embodiments principle of the present invention and spirit are described.Should be appreciated that providing these execution modes only is for those skilled in the art can being understood better and then realize the present invention, and be not to limit the scope of the invention by any way.On the contrary, it is in order to make the disclosure thorough more and complete that these execution modes are provided, and the scope of the present disclosure intactly can be conveyed to those skilled in the art.
The invention discloses the method for a kind of file encryption and deciphering, utilize encryption key that electronic document is encrypted, further utilize client public key again, improved the security performance of electronic document encryption keys.
The method of a kind of file encryption provided by the present invention comprises: receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification; Generate encryption key, utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document; Read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information; With document identification and key information corresponding stored; Encrypted document is sent to client.
The method of a kind of document deciphering provided by the present invention comprises: the encrypted document that reception server sends; Send key information request to server, described key information request comprises the document identification of described encrypted document; The key information of the described document identification correspondence that reception server sends; From certificate equipment, obtain private key for user, utilize private key for user to key information decipher encryption key; Utilize encryption key that encrypted document is decrypted and obtain electronic document storage in internal memory.
Below in conjunction with accompanying drawing the embodiment of the invention is elaborated.
Embodiment one
Fig. 1 is the method embodiment one flow process schematic diagram of a kind of file encryption of the present invention, comprising:
Step 101: receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification.
When the user need read electronic document, send the electronic document download request by user end to server.User profile comprises user's logon name and login password.Document identification can be in file number, document title and the Doctype any one or multiple.Electronic document can be PDF document, WORD document and TEXT document etc.
Step 102: generate encryption key, utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document.
Encryption key is the encryption key that server generates when receiving the electronic document download request at random.The encryption key of Sheng Chenging can be any string number, letter or the combination of the two at random.
Step 103: read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information.
The user is when server registration, server adopts PKIX technology (Public Key Infrastructure, PKI) give one group of client public key of user's Random assignment and private key for user, client public key is stored in server end, and private key for user is sent to client stores to authenticating device.Private key for user can be decrypted client public key encrypted secret key information.
Step 104: with document identification and key information corresponding stored.
The encryption key that obtains after the key information deciphering is decrypted for the pairing encrypted document of document identification.
Step 105: encrypted document is sent to client.
The order of step 105 and step 103-104 can be exchanged, that is, step 105 can also be carried out in step 102 back, does not specifically limit here.
As shown in the above, the present invention has following beneficial effect:
The electronic document that obtains after the user's download is an encrypted document, need the private key for user in the certificate of utility equipment that the key information deciphering of storing in the server is obtained encryption key, deciphering obtains electronic document to encrypted document to utilize encryption key again, because what user's download obtained is encrypted document, even the encrypted document after will downloading is revealed, because not having certificate equipment to be connected to server is decrypted the encrypted document after downloading, can't read the content in the electronic document, because electronic document storage is in the internal memory of the client of user's download, can not directly copy and electronic document be revealed the security performance height.
Embodiment two
Fig. 2 compares with embodiment one for method embodiment two flow charts of a kind of file encryption of the present invention, and embodiment two also comprises registration and authentication, specifically comprises:
Step 201: receive user's register requirement that client sends, described user's register requirement comprises user profile.
The user can send user's register requirement by user end to server according to actual needs.
Step 202: user profile is carried out authentication, when authentication is passed through, Random assignment client public key and private key for user.
Server carries out authentication, can claim to carry out authentication with user profile such as login passwords according to user login name.When the user has the registration authority, utilize the PKI technology to distribute one group of client public key and private key for user for the user.
Step 203: with user profile and client public key corresponding stored.
Client public key is stored on the server, corresponding with user profile.
Step 204: send the response of succeeding in registration to client, the described response of succeeding in registration comprises private key for user.
After client receives the response of succeeding in registration, can be according to the user profile logon server.
Step 205: receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification.
Step 206: carry out authentication according to described user profile, when the user has the authority of downloading document, generate encryption key.
When server receives the profile download request, carry out authentication, check whether user's logon name and password be corresponding, and whether the user has the authority of the electronic document of downloading described document identification correspondence etc.
When the user has the authority of downloading document, generate an encryption key at random.
Step 207: utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document.
Step 208: read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information.
Step 209: with document identification and key information corresponding stored.
Step 210: encrypted document is sent to client.
Step 211: delete described encrypted document.
After server sends to client with encrypted document, the interim encrypted document that generates in the deletion server.Server is encrypted electronic document again and is generated encrypted document when receiving the electronic document download request at every turn.
Step 210-211 can also carry out after step 207, does not limit here.
Embodiment three
Fig. 3 is method embodiment three schematic flow sheets of a kind of document deciphering of the present invention, comprising:
Step 301: the encrypted document that reception server sends.
Step 302: send key information request to server, described key information request comprises the document identification of described encrypted document.
After client receives encrypted document, send the request of the key information that obtains described encrypted document to server.Server stores has the document identification and the corresponding key information thereof of electronic document.
Step 303: the key information of the described document identification correspondence that reception server sends.
Server is searched the pairing key information of document identification according to document identification and is sent to client.
Step 304: from certificate equipment, obtain private key for user, utilize private key for user to key information decipher encryption key.
Described certificate equipment comprises USB Key or IC-card etc.
Store private key for user in the certificate equipment, the key information after private key for user can be encrypted client public key is decrypted, and obtains the encryption key that electronic document is encrypted.
Step 305: utilize encryption key that encrypted document is decrypted and obtain electronic document storage in internal memory.
Encryption key obtains electronic document after encrypted document is deciphered, and electronic document is kept in the internal memory of client, can not copy, can only online reading.
Embodiment four
Fig. 4 compares with embodiment three for method embodiment four schematic flow sheets of a kind of document deciphering of the present invention, also comprises to server registration, specifically comprises:
Step 401: send user's register requirement to server, described user's register requirement comprises user profile.
Step 402: the response of succeeding in registration that reception server sends, the described response of succeeding in registration comprises private key for user.
Server to the user profile authentication after, generate one group of client public key and private key for user at random, private key for user is sent to client.
Step 403: private key for user is sent to the certificate device storage.
Certificate equipment comprises USB Key or IC-card etc.
Step 404: the encrypted document that reception server sends.
Step 405: send key information request to server, described key information request comprises the document identification of described encrypted document.
Step 406: the key information of the described document identification correspondence that reception server sends.
Step 407: from certificate equipment, obtain private key for user, utilize private key for user to key information decipher encryption key.
Step 408: utilize encryption key that encrypted document is decrypted and obtain electronic document storage in internal memory.
Step 409: utilize the reader that mates with electronic document type from internal memory, to read electronic document.
If electronic document is the PDF document, then from internal memory, read electronic document with the PDF document reader.Electronic document storage after the deciphering can not copy in internal memory, and security performance improves.
Embodiment five
Fig. 5 is a kind of file encryption device of the present invention embodiment five structural representations, comprising:
First receiving element 501 is used to receive the electronic document download request that client sends, and described electronic document download request comprises user profile and document identification.
First transmitting element 505 is used for encrypted document is sent to client.
Optionally, described device further comprises:
First authenticating unit is used for carrying out authentication according to described user profile, when the user has the authority of downloading document, carries out generating encryption key.
Optionally, described device further comprises:
Delete cells is used to delete described encrypted document.
Optionally, described device further comprises:
Second receiving element is used to receive user's register requirement that client sends, and described user's register requirement comprises user profile;
Second authenticating unit is used for user profile is carried out authentication, when authentication is passed through, and Random assignment client public key and private key for user;
Second memory cell is used for user profile and client public key corresponding stored;
Second transmitting element is used for sending the response of succeeding in registration to client, and the described response of succeeding in registration comprises private key for user.
Embodiment six
Fig. 6 is a kind of document decryption device of the present invention embodiment six structural representations, comprising:
The 3rd receiving element 601 is used for the encrypted document that reception server sends.
The 3rd transmitting element 602 is used for sending key information request to server, and described key information request comprises the document identification of described encrypted document.
The 4th receiving element 603 is used for the key information of the described document identification correspondence that reception server sends.
First decrypting device 604 is used for obtaining private key for user from certificate equipment, utilize private key for user to key information decipher encryption key.
Optionally, described device further comprises:
Reading unit is used for utilizing the reader with the electronic document type coupling to read electronic document from internal memory.
Optionally, described device further comprises:
The 4th transmitting element is used for sending user's register requirement to server, and described user's register requirement comprises user profile;
The 5th receiving element is used for the response of succeeding in registration that reception server sends, and the described response of succeeding in registration comprises private key for user;
The 5th transmitting element is used for private key for user is sent to the certificate device storage.
Embodiment seven
The system of a kind of file encryption of the present invention and deciphering comprises the device of the embodiment of the invention five described a kind of file encryptions and the device of the embodiment of the invention six described a kind of document deciphering.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for a file encryption is characterized in that, is applied to server, and described method comprises:
Receive the electronic document download request that client sends, described electronic document download request comprises user profile and document identification;
Generate encryption key, utilize encryption key that the pairing document content of described document identification is encrypted, generate encrypted document;
Read the client public key of being stored according to user profile, utilize client public key that encryption keys is generated key information;
With document identification and key information corresponding stored;
Encrypted document is sent to client.
2. method according to claim 1 is characterized in that, described method further comprises:
Carry out authentication according to described user profile, when the user has the authority of downloading document, carry out generating encryption key.
3. method according to claim 1 is characterized in that, described method further comprises:
Delete described encrypted document.
4. method according to claim 1 is characterized in that, described method further comprises:
Receive user's register requirement that client sends, described user's register requirement comprises user profile;
User profile is carried out authentication, when authentication is passed through, Random assignment client public key and private key for user;
With user profile and client public key corresponding stored;
Send the response of succeeding in registration to client, the described response of succeeding in registration comprises private key for user.
5. the method for document deciphering is characterized in that be applied to client, described method comprises:
The encrypted document that reception server sends;
Send key information request to server, described key information request comprises the document identification of described encrypted document;
The key information of the described document identification correspondence that reception server sends;
From certificate equipment, obtain private key for user, utilize private key for user to key information decipher encryption key;
Utilize encryption key that encrypted document is decrypted and obtain electronic document storage in internal memory.
6. method according to claim 5 is characterized in that, described method further comprises:
Utilize the reader that mates with electronic document type from internal memory, to read electronic document.
7. method according to claim 5 is characterized in that, described method further comprises:
Send user's register requirement to server, described user's register requirement comprises user profile;
The response of succeeding in registration that reception server sends, the described response of succeeding in registration comprises private key for user;
Private key for user is sent to the certificate device storage.
8. the device of a file encryption is characterized in that, described device comprises:
First receiving element is used to receive the electronic document download request that client sends, and described electronic document download request comprises user profile and document identification;
First ciphering unit is used to generate encryption key, utilizes encryption key that the pairing document content of described document identification is encrypted, and generates encrypted document;
Second ciphering unit is used for reading the client public key of being stored according to user profile, utilizes client public key that encryption keys is generated key information;
First memory cell is used for document identification and key information corresponding stored;
First transmitting element is used for encrypted document is sent to client.
9. device according to claim 8 is characterized in that, described device further comprises:
First authenticating unit is used for carrying out authentication according to described user profile, when the user has the authority of downloading document, carries out generating encryption key.
10. device according to claim 8 is characterized in that, described device further comprises:
Delete cells is used to delete described encrypted document.
11. device according to claim 8 is characterized in that, described device further comprises:
Second receiving element is used to receive user's register requirement that client sends, and described user's register requirement comprises user profile;
Second authenticating unit is used for user profile is carried out authentication, when authentication is passed through, and Random assignment client public key and private key for user;
Second memory cell is used for user profile and client public key corresponding stored;
Second transmitting element is used for sending the response of succeeding in registration to client, and the described response of succeeding in registration comprises private key for user.
12. the device of a document deciphering is characterized in that described device comprises:
The 3rd receiving element is used for the encrypted document that reception server sends;
The 3rd transmitting element is used for sending key information request to server, and described key information request comprises the document identification of described encrypted document;
The 4th receiving element is used for the key information of the described document identification correspondence that reception server sends;
First decrypting device is used for obtaining private key for user from certificate equipment, utilize private key for user to key information decipher encryption key;
Second decrypting device is used to utilize encryption key that encrypted document is decrypted and obtains electronic document.
13. device according to claim 12 is characterized in that, described device further comprises:
Reading unit is used for utilizing the reader with the electronic document type coupling to read electronic document from internal memory.
14. device according to claim 12 is characterized in that, described device further comprises:
The 4th transmitting element is used for sending user's register requirement to server, and described user's register requirement comprises user profile;
The 5th receiving element is used for the response of succeeding in registration that reception server sends, and the described response of succeeding in registration comprises private key for user;
The 5th transmitting element is used for private key for user is sent to the certificate device storage.
15. the system of file encryption and deciphering is characterized in that described system comprises:
The device of any described document deciphering of the device of any described file encryption of claim 8-11 and claim 12-14.
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| CN2013101496601A CN103220295A (en) | 2013-04-26 | 2013-04-26 | Document encryption and decryption method, device and system |
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| CN103716330A (en) * | 2014-01-03 | 2014-04-09 | 网易（杭州）网络有限公司 | Method and device for encryption and decryption of digital content |
| CN104298896A (en) * | 2014-09-30 | 2015-01-21 | 广州星汇文化发展有限公司 | Method and system for managing and distributing digital rights |
| 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 |
| CN108319863A (en) * | 2017-01-18 | 2018-07-24 | 珠海金山办公软件有限公司 | A kind of enterprise-level key decrypting method and device |
| CN108509799A (en) * | 2017-02-23 | 2018-09-07 | 珠海金山办公软件有限公司 | A kind of template document acquisition methods, apparatus and system |
| CN108632021A (en) * | 2017-03-15 | 2018-10-09 | 阿里巴巴集团控股有限公司 | A kind of key encryption method, device and system |
| CN108737335A (en) * | 2017-04-14 | 2018-11-02 | 广州小兵过河信息科技有限公司 | The method of meeting document process based on private clound |
| CN108770370A (en) * | 2015-12-29 | 2018-11-06 | 科因普拉格株式会社 | Method for being authenticated and verifying to file and server |
| CN109698935A (en) * | 2017-10-24 | 2019-04-30 | 中国移动通信有限公司研究院 | Monitor video encrypting and decrypting method and device, equipment, storage medium, system |
| CN110224989A (en) * | 2019-05-10 | 2019-09-10 | 深圳壹账通智能科技有限公司 | Information interacting method, device, computer equipment and readable storage medium storing program for executing |
| CN110636503A (en) * | 2019-09-24 | 2019-12-31 | 中国联合网络通信集团有限公司 | Data encryption method, device, equipment and computer readable storage medium |
| CN111159743A (en) * | 2019-12-30 | 2020-05-15 | 掌阅科技股份有限公司 | File encryption method of electronic book reader, computing device and storage medium |
| CN112733130A (en) * | 2021-01-18 | 2021-04-30 | 成都质数斯达克科技有限公司 | Account registration method and device, electronic equipment and readable storage medium |
| CN114726655A (en) * | 2022-06-07 | 2022-07-08 | 深圳市永达电子信息股份有限公司 | Character set encryption method based on digital certificate identity authentication |
| CN116089986A (en) * | 2023-04-07 | 2023-05-09 | 深圳天谷信息科技有限公司 | Electronic document management method, device, equipment and medium capable of configuring security policy |
| CN116644458A (en) * | 2023-07-26 | 2023-08-25 | 泸州职业技术学院 | Electronic system information security protection system |
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| CN103716330A (en) * | 2014-01-03 | 2014-04-09 | 网易（杭州）网络有限公司 | Method and device for encryption and decryption of digital content |
| CN103716330B (en) * | 2014-01-03 | 2017-07-04 | 网易（杭州）网络有限公司 | A kind of digital content encryption and decryption method and equipment |
| CN104298896B (en) * | 2014-09-30 | 2017-09-26 | 广州星汇文化发展有限公司 | Digital copyright protecting and distribution method and system |
| CN104298896A (en) * | 2014-09-30 | 2015-01-21 | 广州星汇文化发展有限公司 | Method and system for managing and distributing digital rights |
| CN108770370A (en) * | 2015-12-29 | 2018-11-06 | 科因普拉格株式会社 | Method for being authenticated and verifying to file and server |
| CN108770370B (en) * | 2015-12-29 | 2022-05-03 | 科因普拉格株式会社 | Method and server for authenticating and verifying file |
| 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 |
| CN108319863A (en) * | 2017-01-18 | 2018-07-24 | 珠海金山办公软件有限公司 | A kind of enterprise-level key decrypting method and device |
| CN108509799A (en) * | 2017-02-23 | 2018-09-07 | 珠海金山办公软件有限公司 | A kind of template document acquisition methods, apparatus and system |
| CN108632021A (en) * | 2017-03-15 | 2018-10-09 | 阿里巴巴集团控股有限公司 | A kind of key encryption method, device and system |
| US11271726B2 (en) | 2017-03-15 | 2022-03-08 | Alibaba Group Holding Limited | Key encryption methods, apparatuses, and systems |
| CN108737335A (en) * | 2017-04-14 | 2018-11-02 | 广州小兵过河信息科技有限公司 | The method of meeting document process based on private clound |
| CN109698935A (en) * | 2017-10-24 | 2019-04-30 | 中国移动通信有限公司研究院 | Monitor video encrypting and decrypting method and device, equipment, storage medium, system |
| CN110224989B (en) * | 2019-05-10 | 2022-01-28 | 深圳壹账通智能科技有限公司 | Information interaction method and device, computer equipment and readable storage medium |
| CN110224989A (en) * | 2019-05-10 | 2019-09-10 | 深圳壹账通智能科技有限公司 | Information interacting method, device, computer equipment and readable storage medium storing program for executing |
| CN110636503A (en) * | 2019-09-24 | 2019-12-31 | 中国联合网络通信集团有限公司 | Data encryption method, device, equipment and computer readable storage medium |
| CN110636503B (en) * | 2019-09-24 | 2023-03-24 | 中国联合网络通信集团有限公司 | Data encryption method, device, equipment and computer readable storage medium |
| CN111159743A (en) * | 2019-12-30 | 2020-05-15 | 掌阅科技股份有限公司 | File encryption method of electronic book reader, computing device and storage medium |
| CN112733130A (en) * | 2021-01-18 | 2021-04-30 | 成都质数斯达克科技有限公司 | Account registration method and device, electronic equipment and readable storage medium |
| CN114726655A (en) * | 2022-06-07 | 2022-07-08 | 深圳市永达电子信息股份有限公司 | Character set encryption method based on digital certificate identity authentication |
| CN116089986A (en) * | 2023-04-07 | 2023-05-09 | 深圳天谷信息科技有限公司 | Electronic document management method, device, equipment and medium capable of configuring security policy |
| CN116089986B (en) * | 2023-04-07 | 2023-08-25 | 深圳天谷信息科技有限公司 | Electronic document management method, device, equipment and medium capable of configuring security policy |
| CN116644458A (en) * | 2023-07-26 | 2023-08-25 | 泸州职业技术学院 | Electronic system information security protection system |
| CN116644458B (en) * | 2023-07-26 | 2023-11-21 | 泸州职业技术学院 | Electronic system information security protection system |
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Application publication date: 20130724 |