CN106452793A - Method and system of electronic signature - Google Patents
Method and system of electronic signature Download PDFInfo
- Publication number
- CN106452793A CN106452793A CN201611027507.1A CN201611027507A CN106452793A CN 106452793 A CN106452793 A CN 106452793A CN 201611027507 A CN201611027507 A CN 201611027507A CN 106452793 A CN106452793 A CN 106452793A
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- Prior art keywords
- signature
- document
- electronic signature
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
- H04L9/0897—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage involving additional devices, e.g. trusted platform module [TPM], smartcard or USB
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Document Processing Apparatus (AREA)
Abstract
The embodiment of the invention provides a method and a system of an electronic signature. The method of the electronic signature comprises the steps of calling a signing interface to transmit key information of a to-be-signed document to an electronic signature platform, and verifying the to-be-signed document based on the key information and then returning a to-be-signed temporary URL by the electronic signature platform; entering a temporary signing page based on the to-be-signed temporary URL, and determining a signing position by a user; and obtaining a Hash value of the to-be-signed document, performing signature encryption on the Hash value by using USBKEY and delivering the processed Hash value to a background, and adding the signature by the background based on the signing position determined by the user. The method and the system of the electronic signature can provide various digital signing methods based on a traditional certificate, an event certificate, a mobile signature device and etc. The cost is relatively low; and the method and system of the electronic signature can reduce cost and pressure of contract signing of small and medium common enterprises; and the electronic certificate cost is also reduced greatly. The method and the system of the electronic signature are not only suitable for individual consumers, but also can meet collective use of staff of small and medium enterprises.
Description
Technical field
The present invention relates to communication technical field, more particularly, to a kind of method and system of electronic signature.
Background technology
In recent years, promulgate with the U.S. in 2000《Law of electronic signature》, signed based on internet cloud platform clectronic and run
Start to rise.By cloud service, provide online contract, voucher signature related function for all users in the Internet.Not only it is suitable for
In individual consumer colony, and meet medium-sized and small enterprises affiliated personnel collective and use, these enterprises do not have the law works people of oneself
Member, but there is the strong legal services demand in terms of contract formulation, treaty review, legal advice, agent ad litem again.
China promulgates within 2005《Law of electronic signature》, explicitly point out reliable electronic signature and handwritten signature or affix one's seal have equal
Act of law.Subsequently China's electronic signature starts true development and gets up, occurred in that by 2015 method significantly, lucky token, cloud label,
Draw the internet electronic Digital signature service platforms such as a signature.On December 1st, 2015, lucky token obtains a new round 29,300,000 financing；September 15
Day, Chinese cloud label obtained the additional financing of 20,000,000 angels' wheels again, and angel takes turns financing and adds up to 50,000,000 yuan.September 7 days, method obtains significantly
Obtain A and take turns 15,000,000 yuan of financings.Developing rapidly of these electronic signature cloud platforms has also confirmed Chinese society to the city signing electronically
Field tight demand.
A kind of method of the prior art is：《A kind of high in the clouds electron underwriting authentication method》Open (bulletin) number:
CN105553670A；This patent mainly provides Electronic Signature and makes and electronic signature authentication method, does not close with electronics
With carrying out seamless effective integration, do not carry out the actually active relevant feature advantage using electronic signature yet.
Content of the invention
The embodiment provides a kind of method and system of electronic signature；The invention provides following scheme：
Call signature interface the key message of document to be signed is passed to electronic signature platform, by electronic signature platform according to
Described key message returns after verifying described document to be signed and waits to sign interim URL；
Wait that signing interim URL enters the interim signature page, determines signature position by user according to described；
Obtain the cryptographic Hash of described document to be signed, using USBKEY, encrypted signature is carried out to described cryptographic Hash and be transferred to
Backstage, by backstage signed according to determined by user position add signature.
According to the said method of the present invention, described key message includes：The ID of described document to be signed and literary composition
Shelves mark.
According to the said method of the present invention, check interface by described ID and document mark by calling document signature
Know and reach electronic signature platform, the signature interim URL of displaying that returns to document is judged by electronic signature platform, according to described literary composition after authority
Shelves signature shows that interim URL enters document signature and shows temporary page.
According to the said method of the present invention, show in temporary page in document signature, add and download control, under described
The signature preview document that load control is displayed in described document signature displaying temporary page is preserved with PDF.
According to a further aspect in the invention, a kind of system of electronic signature is also provided, including：
Calling module：It is used for calling signature interface that the key message of document to be signed is passed to electronic signature platform, by
Electronic signature platform verifies to return after described document to be signed according to described key message and waits to sign interim URL；
Enter module：It is used for waiting that signing interim URL enters the interim signature page, determines signature bit by user according to described
Put；
Add module：It is used for obtaining the cryptographic Hash of described document to be signed, using USBKEY, described cryptographic Hash is carried out
Encrypted signature is simultaneously transferred to backstage, by backstage signed according to determined by user position add signature.
According to a further aspect in the invention, described key message includes：The ID of described document to be signed and literary composition
Shelves mark.
According to a further aspect in the invention, a kind of system of electronic signature, also includes display module：It is used for by calling
Document signature checks that described ID and document identification are reached electronic signature platform by interface, is judged by electronic signature platform
The signature that returns to document after authority shows interim URL, shows that interim URL enters document signature displaying according to described document signature interim
The page.
According to a further aspect in the invention, described display module is additionally operable to show in temporary page in document signature, adds
Download control, by described download control be displayed on described document signature show signature preview document in temporary page with
PDF preserves.
Can be seen that the embodiment of the present invention by the technical scheme that embodiments of the invention described above provide calls signature interface to incite somebody to action
The key message of document to be signed passes to electronic signature platform, is treated according to described key message verifies by electronic signature platform
Return after signature document and wait to sign interim URL；Wait that signing interim URL enters the interim signature page, is determined by user according to described
Signature position；Obtain the cryptographic Hash of described document to be signed, using USBKEY, encrypted signature is carried out to described cryptographic Hash and transmit
To backstage, signature is added by backstage position of signing according to determined by user.This invention can be provided based on traditional certificate, event card
The various digital signature means such as book, mobile signature equipment.Cost is relatively low, and this invention can lower what medium and small ordinary enterprises were signed a contract
Cost and pressure, digital certificates cost can also decline to a great extent.It is applicable not only to individual consumer colony, and meet medium and small
Affiliated personnel collective of enterprise uses.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to required use in embodiment description
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the business integration conceptual scheme of the embodiment of the present invention one；
A kind of process chart of the method for electronic signature that Fig. 2 provides for the embodiment of the present invention one；
A kind of system module figure of the system of electronic signature that Fig. 3 provides for the embodiment of the present invention two.
Specific embodiment
For ease of the understanding to the embodiment of the present invention, do further below in conjunction with accompanying drawing taking several specific embodiments as a example
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
Embodiment one
The present invention is to integrate sealing system and document technology in electronic invoice above cloud service platform based on space flight cloud net
Carry out electronic signature application, provide on-line signing, safe storage service, legal advice, card with " the Internet combines contract " form
According to the service such as extraction.It can provide mould plate technique, document structure tree, pipe for business such as electronic invoice, space flight cloud net electronic contracts
The high-reliability service such as reason, Electronic Signature, timestamp, have finance simultaneously for the document in space flight cloud net cloud service platform
The security protections such as the encryption cloud storage of rank, data backup.The electronic document signed in electronic signature cloud platform has credible
Third party, legal bases, the anti-tamper, safety guarantee such as resisting denying, Perfect Time.Space flight cloud net cloud clothes described in the present embodiment
Business platform is only used as the embodiment of a cloud platform, does not constitute limitation, hereinafter referred to as space flight cloud net platform to the present invention；This reality
Apply the business integration scheme of example as shown in Figure 1：
Wherein, first, the user participating in electronic signature needs in the registration of space flight cloud net platform and real-name authentication；Buying side and
Seller is to open the enterprise account that certification is passed through on space flight cloud net cloud service contract platform, and space flight cloud net platform simultaneously carries for it
For application digital certificate, make Electronic Signature, set up the functions such as the contract template that can use.Interface routine is provided, has assisted
Become integrated work.
Specifically, buying side and seller become note by space flight prefecture shopping center electronic contract application cloud service platform
After volume user, the correlation technique flow process of applying for electronic signature is as follows：
Applying digital certificate is carried out by buying side and seller user；
Whether CA (Certificate Authority, digital certificate authorized organization) system centre replys user can be with Shen
Please digital certificate；
Space flight cloud net platform newly increases E-seal application menu, and the user after real-name authentication can carry in this menu
Go out E-seal application；
Space flight cloud net platform calls electronic signature platform examination ＆ verification interface, will be flat for user's real name information transmission electron signature
Platform, and obtain the ID returning.
Electronic signature platform passes through user's material by CA company, is user's accreditation digital certificate, Electronic Signature, and will
USBKey gives user.
Specifically, timestamp is generated by CA system centre；CA system centre carries out the making of USBKey based on user profile；
The USBKey making is mailed to user by CA system centre.
Buying side and seller carry out contract signing using respective USBKey；
Electronic signature platform be the different types of list of space flight cloud net generate template, both parties pass through audit after, space flight
Cloud net Background scheduling electronic signature platform contract generates interface, incoming template ID and parameter information, electronic signature platform interior life
Become electronic contract, and the ID that returns to document.
This embodiment offers a kind of handling process of the method for electronic signature as shown in figure 1, its process step is as follows：Step
Rapid 11, call signature interface that the key message of document to be signed is passed to electronic signature platform, by electronic signature platform according to institute
State to return after key message verifies described document to be signed and wait to sign interim URL；
Described key message includes：The ID of described document to be signed and document identification.
Specifically, both parties are after examination ＆ verification, and display contract is to treat label state by space flight cloud web page, and sealed contract
Button.After user clicks on signature button, ID, document id are passed to electronic signature and are put down by space flight cloud net Background scheduling signature interface
Platform, returns after electronic signature platform verification signature state and waits to sign interim URL, User Page jumps to being somebody's turn to do of electronic signature platform
The page signed by document.
Step 12, according to described wait to sign interim URL enter interim sign the page, signature position is determined by user；
Specifically, in the interim signature page, document content is shown with graphic form in the page, and user is permissible
Autonomous Control pattern signature action on the page, thus be felt as to user operation signing in PDF document.This pattern can
With multiple browser-safes, locally obtain PDF document also without user, it is to avoid both sides sign the problem of conflict simultaneously simultaneously.
Step 13, the cryptographic Hash of the described document to be signed of acquisition, carry out encrypted signature using USBKEY to described cryptographic Hash
And be transferred to backstage, by backstage signed according to determined by user position add signature.
Specifically, user affixes one's seal after selecting stamped signature position, and front page layout obtains backstage the document HASH (Hash) value, and makes
Carry out signature operation with USBKEY, transfer data to backstage, signature is added to PDF document in backstage, completes signature action.
The back office interface of above signature flow process electronic signature platform all provided by the present invention and jump page complete, space flight
Cloud net only need simply integrated can be it is not necessary to extra development.
By calling document signature to check, described ID and document identification are reached electronic signature platform by interface, by
Electronic signature platform returns to document to sign after judging authority and shows interim URL, shows that interim URL enters according to described document signature
Document signature shows temporary page.
Specifically, add in the space flight cloud net contract page and check contract control, click on and check control, space flight cloud net backstage is adjusted
Check that ID and document identification are passed to electronic signature platform by interface with contract, electronic signature platform returns after judging authority
With showing interim URL, User Page jumps to this page to bout.
Show in temporary page in document signature, add and download control, described literary composition is displayed on by described download control
Shelves signature shows that the signature preview document in temporary page is preserved with PDF.
In provisional contract displayed page, document content and stamped signature are shown have and PDF in the page with graphic form
Reader is similar to effect, and user can click on download control simultaneously, downloads the electronic contract through both sides' signature and carries out user's literary composition
Shelves are local to be filed.
Additionally, space flight prefecture buying cloud service platform provides external interface to be collected with the electronic signature platform of the present embodiment
Become, integration mode includes two kinds, and one kind is by Web Services interface, provides packaged jar bag, can be with space flight prefecture
Procurement platform is integrated.Mainly realize the functions such as certification user's registration, the URL that contract is signed, generation contract is checked.This interface needs
Space flight prefecture procurement platform called in the opportune moment of business.Second is to provide page URL skipped mode, can be special by space flight
Area's procurement platform jumps to contract platform and checks or specific electronic contract.
Embodiment two
This embodiment offers the resource management apparatus in a kind of multimedia communications system, it implements structure such as Fig. 3
Shown, specifically can include following module：
Calling module 31：It is used for calling signature interface that the key message of document to be signed is passed to electronic signature platform,
Verify to return after described document to be signed according to described key message by electronic signature platform and wait to sign interim URL；
Enter module 32：It is used for waiting that signing interim URL enters the interim signature page, determines signature by user according to described
Position；
Add module 33：It is used for obtaining the cryptographic Hash of described document to be signed, using USBKEY, described cryptographic Hash is entered
Row encrypted signature is simultaneously transferred to backstage, by backstage signed according to determined by user position add signature.
Described key message includes：The ID of described document to be signed and document identification.
A kind of system of electronic signature of the present embodiment, also includes display module 34：It is used for by calling document signature
Check that described ID and document identification are reached electronic signature platform by interface, judge to return after authority by electronic signature platform
Return document signature and show interim URL, show that interim URL enters document signature and shows temporary page according to described document signature.
Described display module 34 is additionally operable to show in temporary page in document signature, adds and downloads control, under described
The signature preview document that load control is displayed in described document signature displaying temporary page is preserved with PDF.Use the present invention
The detailed process that the system of embodiment is signed electronically is similar with preceding method embodiment, and here is omitted.
In sum, the embodiment of the present invention is passed through to call signature interface that the key message of document to be signed is passed to electronics label
Name platform, is verified to return after described document to be signed according to described key message by electronic signature platform and waits to sign interim URL；Root
Wait that signing interim URL enters the interim signature page, determines signature position by user according to described；Obtain the Kazakhstan of described document to be signed
Uncommon value, carries out encrypted signature using USBKEY to described cryptographic Hash and is transferred to backstage, signed by backstage according to determined by user
Signature is added in name position.This invention can be provided based on the various digital signature handss such as traditional certificate, event credential, mobile signature equipment
Section.Cost is relatively low, and this invention can lower cost and the pressure that medium and small ordinary enterprises are signed a contract, and digital certificates cost can also be big
Width declines.It is applicable not only to individual consumer colony, and meet medium-sized and small enterprises affiliated personnel collective and use.
One of ordinary skill in the art will appreciate that：Accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or
Flow process is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
Mode by software plus necessary general hardware platform to be realized.Based on such understanding, technical scheme essence
On in other words prior art is contributed partly can be embodied in the form of software product, this computer software product
Can be stored in storage medium, such as ROM/RAM, magnetic disc, CD etc., include some instructions use so that a computer equipment
(can be personal computer, server, or network equipment etc.) executes some of each embodiment of the present invention or embodiment
Partly described method.
Each embodiment in this specification is all described by the way of going forward one by one, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Especially for device or
For system embodiment, because it is substantially similar to embodiment of the method, so describing fairly simple, referring to method in place of correlation
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematically wherein said conduct
Separating component explanation unit can be or may not be physically separate, as the part that unit shows can be or
Person may not be physical location, you can with positioned at a place, or can also be distributed on multiple NEs.Can root
Factually border need select the purpose to realize this embodiment scheme for some or all of module therein.Ordinary skill
Personnel are not in the case of paying creative work, you can to understand and to implement.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in,
All should be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (8)
1. a kind of method of electronic signature is it is characterised in that include：
Call signature interface that the key message of document to be signed is passed to electronic signature platform, by electronic signature platform according to described
Key message returns after verifying described document to be signed and waits to sign interim URL；
Wait that signing interim URL enters the interim signature page, determines signature position by user according to described；
Obtain the cryptographic Hash of described document to be signed, after described cryptographic Hash being carried out with encrypted signature and is transferred to using USBKEY
Platform, by backstage signed according to determined by user position add signature.
2. a kind of method of electronic signature according to claim 1 is it is characterised in that described key message includes：Described
The ID of document to be signed and document identification.
3. a kind of method of electronic signature according to claim 2 is it is characterised in that connect by calling document signature to check
Described ID and document identification are reached electronic signature platform by mouth, judge to return to document after authority by electronic signature platform
Signature shows interim URL, shows that interim URL enters document signature and shows temporary page according to described document signature.
4. a kind of method of electronic signature according to claim 2 is it is characterised in that show temporary page in document signature
In, add and download control, download, by described, the signature preview that control is displayed in described document signature displaying temporary page
Document is preserved with PDF.
5. a kind of system of electronic signature is it is characterised in that include：
Calling module：It is used for calling signature interface the key message of document to be signed to be passed to electronic signature platform, by electronics
Signature platform verifies to return after described document to be signed according to described key message and waits to sign interim URL；
Enter module：It is used for waiting that signing interim URL enters the interim signature page, determines signature position by user according to described；
Add module：It is used for obtaining the cryptographic Hash of described document to be signed, using USBKEY, described cryptographic Hash is signed
Encrypt and be transferred to backstage, by backstage signed according to determined by user position add signature.
6. a kind of system of electronic signature according to claim 5 is it is characterised in that described key message includes：Described
The ID of document to be signed and document identification.
7. a kind of system of electronic signature according to claim 6 is it is characterised in that also include display module：It is used for
By calling document signature to check, described ID and document identification are reached electronic signature platform by interface, by signing electronically
Platform returns to document after judging authority to sign and shows interim URL, shows that interim URL enters document signature according to described document signature
Show temporary page.
8. a kind of system of electronic signature according to claim 7 is it is characterised in that described display module is additionally operable in literary composition
Shelves are signed and are shown in temporary page, add and download control, are displayed on described document signature displaying by described download control and face
When the page in signature preview document with PDF preserve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027507.1A CN106452793A (en) | 2016-11-21 | 2016-11-21 | Method and system of electronic signature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027507.1A CN106452793A (en) | 2016-11-21 | 2016-11-21 | Method and system of electronic signature |
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| CN106452793A true CN106452793A (en) | 2017-02-22 |
Family
ID=58220865
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| CN201611027507.1A Pending CN106452793A (en) | 2016-11-21 | 2016-11-21 | Method and system of electronic signature |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107204854A (en) * | 2017-06-30 | 2017-09-26 | 上海测吧信息技术有限公司 | A kind of digital signature method based on USB TOKEN |
| CN108900303A (en) * | 2018-09-25 | 2018-11-27 | 甘肃万维信息技术有限责任公司 | A method of it signs electronically online |
| CN109064121A (en) * | 2018-07-11 | 2018-12-21 | 飞天诚信科技股份有限公司 | A kind of method and device for signing electronic contract |
| CN109150516A (en) * | 2018-08-31 | 2019-01-04 | 密信技术(深圳)有限公司 | The signature and/or encryption method of browser file, device, browser and medium |
| CN109474434A (en) * | 2018-11-14 | 2019-03-15 | 北京天威诚信电子商务服务有限公司 | A kind of visualization digital endorsement method, device, medium and equipment |
| CN109660338A (en) * | 2018-11-19 | 2019-04-19 | 如般量子科技有限公司 | Anti- quantum calculation digital signature method and anti-quantum calculation digital signature system based on pool of symmetric keys |
| CN109784873A (en) * | 2019-02-28 | 2019-05-21 | 飞天诚信科技股份有限公司 | A kind of working method and equipment of electronic contract signature platform |
| CN110188952A (en) * | 2019-05-31 | 2019-08-30 | 国网上海市电力公司 | A kind of smart city comprehensive energy transaction system |
| CN110474778A (en) * | 2019-08-09 | 2019-11-19 | 北京智汇信元科技有限公司 | A kind of electronic contract signature method and system |
| CN111444493A (en) * | 2020-04-25 | 2020-07-24 | 中信银行股份有限公司 | Electronic contract signing method and device, electronic equipment and readable storage medium |
| CN112132573A (en) * | 2019-06-24 | 2020-12-25 | 鄢华中 | CA (certificate Authority) and Key removal electronic signature and electronic contract system based on block chain |
| CN112131610A (en) * | 2020-09-07 | 2020-12-25 | 百望股份有限公司 | Format file digital signature method and electronic equipment |
| CN112329395A (en) * | 2019-07-18 | 2021-02-05 | 神通资讯科技股份有限公司 | Electronic signature system and method using web service |
| CN112860153A (en) * | 2021-02-08 | 2021-05-28 | 厦门市法度信息科技有限公司 | Mirror image interactive electronic signature system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107204854A (en) * | 2017-06-30 | 2017-09-26 | 上海测吧信息技术有限公司 | A kind of digital signature method based on USB TOKEN |
| CN109064121A (en) * | 2018-07-11 | 2018-12-21 | 飞天诚信科技股份有限公司 | A kind of method and device for signing electronic contract |
| CN109150516A (en) * | 2018-08-31 | 2019-01-04 | 密信技术(深圳)有限公司 | The signature and/or encryption method of browser file, device, browser and medium |
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| CN109474434A (en) * | 2018-11-14 | 2019-03-15 | 北京天威诚信电子商务服务有限公司 | A kind of visualization digital endorsement method, device, medium and equipment |
| CN109660338A (en) * | 2018-11-19 | 2019-04-19 | 如般量子科技有限公司 | Anti- quantum calculation digital signature method and anti-quantum calculation digital signature system based on pool of symmetric keys |
| CN109660338B (en) * | 2018-11-19 | 2021-07-27 | 如般量子科技有限公司 | Anti-quantum computation digital signature method and system based on symmetric key pool |
| CN109784873A (en) * | 2019-02-28 | 2019-05-21 | 飞天诚信科技股份有限公司 | A kind of working method and equipment of electronic contract signature platform |
| CN109784873B (en) * | 2019-02-28 | 2021-07-02 | 飞天诚信科技股份有限公司 | Working method and device of electronic contract signing platform |
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| CN110474778B (en) * | 2019-08-09 | 2022-04-15 | 北京智汇信元科技有限公司 | Electronic contract signing method and system |
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