CN103259665A - Method and system of electronic signature - Google Patents
Method and system of electronic signature Download PDFInfo
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- CN103259665A CN103259665A CN2013102040475A CN201310204047A CN103259665A CN 103259665 A CN103259665 A CN 103259665A CN 2013102040475 A CN2013102040475 A CN 2013102040475A CN 201310204047 A CN201310204047 A CN 201310204047A CN 103259665 A CN103259665 A CN 103259665A
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Abstract
The invention discloses a method and system of an electronic signature. The method of the electronic signature comprises the following steps: a signature step: taking an electronic seal which is manufactured in a UKEY in advance, and stamping the electronic seal in an original document to form a signature document, and a verification step: extracting the original document in the signature document, and verifying the extracted original document. The electronic seal is stored in the UKEY so that potential safety hazards due to the fact that the electronic seal is stored on a server can be avoided, and the electronic seal is convenient and fast to use. The original document after signature is verified, and therefore possible mistakes of the original document in the process of signature are solved, authenticity and integrity of the original document are guaranteed, and unnecessary loss is avoided.
Description
Technical field
The present invention relates to the computer information safety technique field, particularly a kind of electronic signature method and system.
Background technology
Along with the fast development of Internet technology and E-Government, The rise of electronic commerce, a large amount of electronic documents (official document, contract etc.) need transmit between different user or exchange by network, and the E-seal technology is also arisen at the historic moment.E-seal is the expression-form of seal in computer of common and normal use in people's daily life; it is the new and high technology of utilizing realization Electronic Signature functions such as computer encipher algorithm; compare with physical seal; E-seal is owing to be subjected to the protection of various cryptographic algorithm; can not be forged and pretend to be; therefore, E-seal has been widely used in government offices at different levels and the enterprises and institutions.
At present, normally carry out the stamped signature operation of E-seal by server, be specially: be stored in E-seal in the server in advance, from server, transfer Electronic Signature during stamped signature again, because this method all is stored in all E-seals in the server, this has just caused potential security risk, if website or server are attacked, all Electronic Signatures will lose efficacy; And original document is made mistakes in the stamped signature process easily, and this method can't guarantee the authenticity and integrity of the original file content behind the stamped signature, and this point is particularly important in E-Government, ecommerce.
In addition, at present, the E-seal private key that uses public-key usually authenticates, do not use digital certificate, therefore this method only is applicable between two entities of mutual trust and authenticates, be unfavorable for authenticating between two strange entities, and when carrying out many people stamped signature, also cause the complicated of stamped signature management easily.
Summary of the invention
In view of this, the present invention proposes a kind of electronic signature method and system, solving the potential safety hazard that E-seal exists, and the problem that in the stamped signature process, can't guarantee the authenticity and integrity of original document.
An aspect the present invention proposes a kind of electronic signature method, and this method comprises the steps: the stamped signature step, transfers the E-seal that is made in advance among the UKEY, and E-seal added to be placed in the original document generates the stamped signature file; Verification step extracts original original paper from the stamped signature file, and the original document that extracts is verified.
Further, in the stamped signature step of above-mentioned electronic signature method, E-seal added be placed on original document and further comprise: digital digest obtains substep, extracts digital digest from original document; Digital signature generates step, digital digest is encrypted the generation digital signature, and digital signature is loaded in the E-seal of transferring; The stamped signature file generates step, E-seal is added to be placed on generate the stamped signature file in the original document.
Further, in the above-mentioned electronic signature method, verification step comprises: extract substep, extract original document and E-seal from the stamped signature file; Original figure abstract extraction substep extracts digital digest from the original document that extracts; The seal digital digest extracts substep, extracts digital signature from E-seal, and extract digital digest from digital signature; The checking substep extracts the digital digest that extracts in the substep with the digital digest that extracts in the original figure abstract extraction substep and seal digital digest and compares, if identical, then be verified as correct, if difference then is verified as mistake.
Further, in the stamped signature step of above-mentioned electronic signature method, E-seal is made among the UKEY as follows in advance: seal picture obtaining step, obtain the pictorial information of original seal; Additional information is added step, the additional information of original seal is added into generates E-seal in the pictorial information; Storing step deposits E-seal and the digital certificate that obtains from CA certificate mechanism the UKEY in.
Further, in the above-mentioned electronic signature method, additional information comprises: title, date and authentication password.
On the other hand, the invention allows for a kind of Electronic Seal System, this system comprises stamped signature module and authentication module.The stamped signature module is used for transferring the E-seal that is made in UKEY in advance, and E-seal added to be placed on generates the stamped signature file in the original document; Authentication module is used for extracting original original paper from the stamped signature file, and the original document that extracts is verified.
Further, in the above-mentioned Electronic Seal System, the stamped signature module comprises: the digital digest acquiring unit is used for extracting digital digest from original document; The digital signature generation unit is used for digital digest is encrypted the generation digital signature, and digital signature is loaded in the E-seal of transferring; The stamped signature file generating unit is placed on original document generation stamped signature file for E-seal is added.
Further, in the above-mentioned Electronic Seal System, authentication module comprises: extraction unit is used for extracting original document and E-seal from the stamped signature file; Original figure abstract extraction unit is used for extracting digital digest from the original document that extracts; Seal digital digest extraction unit is used for extracting digital signature from E-seal, and extracts digital digest from digital signature; The checking subelement compares for the digital digest that extracts in the digital digest that original figure abstract extraction substep is extracted and the seal digital digest extraction substep, if identical, then is verified as correctly, if difference then is verified as mistake.
Further, above-mentioned Electronic Seal System also comprises: seal picture acquisition module, for the pictorial information that obtains original seal; Additional information is added module, is added into pictorial information for the additional information with original seal and generates E-seal; Memory module is used for depositing E-seal and the digital certificate that obtains from CA certificate mechanism in UKEY.
Electronic signature method among the present invention and system are stored in E-seal among the UKEY, have not only avoided being stored in existing potential safety hazard in the server, also make the use of E-seal more convenient simultaneously; In addition, this method is also verified the original document behind the stamped signature, has solved the mistake that original document may occur in the stamped signature process, has guaranteed the authenticity and integrity of original document, has avoided unnecessary economic loss.
Description of drawings
The accompanying drawing that constitutes a part of the present invention is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of electronic signature method embodiment of the present invention;
Fig. 2 is among the electronic signature method embodiment of the present invention, the sub-process figure of stamped signature step;
Fig. 3 is among the electronic signature method embodiment of the present invention, the sub-process figure of verification step;
Fig. 4 is among the electronic signature method embodiment of the present invention, and E-seal is made in the method flow diagram among the UKEY in advance;
Fig. 5 is among the electronic signature method embodiment of the present invention, and E-seal is made in the another method flow diagram among the UKEY in advance;
Fig. 6 is among the electronic signature method embodiment of the present invention, the another flow chart of stamped signature step;
Fig. 7 is among the electronic signature method embodiment of the present invention, the another course diagram of verification step;
Fig. 8 is the another flow chart of electronic signature method embodiment of the present invention;
Fig. 9 is the structured flowchart of Electronic Seal System embodiment of the present invention;
Figure 10 is among the Electronic Seal System embodiment of the present invention, the structured flowchart of stamped signature module;
Figure 11 is among the Electronic Seal System embodiment of the present invention, the structured flowchart of authentication module;
Figure 12 is among the Electronic Seal System embodiment of the present invention, the structured flowchart of E-seal Prefabricated block
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the present invention can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Electronic signature method embodiment:
Referring to Fig. 1, there is shown the preferred embodiment of electronic signature method of the present invention.As shown in the figure, this method comprises: stamped signature step S1 transfer and be made in UKEY(USB Key in advance, has the hardware storage device of USB interface) in E-seal, and this E-seal added to be placed on generate the stamped signature file in the original document; Verification step S2 extracts original original paper from this stamped signature file, and the original document that extracts is verified.
Particularly, be stored in E-seal among the UKEY in advance, during stamped signature, from UKEY, transfer earlier E-seal, can realize the stamped signature of E-seal in the OFFICE original document by the Activex technology of Microsoft, also can realize the stamped signature of E-seal in the PDF original document by Acrobat software and the middleware Technology of using Adobe company; Then the original document behind the stamped signature is verified, to determine whether original document makes mistakes in the stamped signature process.
Because this signature method is stored in E-seal among the UKEY, has not only avoided being stored in existing potential safety hazard in the server, also make the use of E-seal more convenient simultaneously; In addition, this method is also verified the original document behind the stamped signature, has solved the mistake that original document may occur in the stamped signature process, has guaranteed the authenticity and integrity of original document, has avoided unnecessary loss.
Referring to Fig. 2, there is shown the preferred implementation method of stamped signature step.As shown in the figure, among the stamped signature step S1, E-seal added be placed on original document and may further include: digital digest obtains substep S11, extracts digital digest from original document, during concrete enforcement, can extract digital digest by SHA-1 algorithm (hash algorithm); Digital signature generates step S12, digital digest is encrypted the generation digital signature, and this digital signature is loaded in the E-seal of transferring, during concrete enforcement, can be encrypted digital digest by private key, by digital watermark technology digital signature is loaded on the E-seal afterwards; The stamped signature file generates step S13, this E-seal is added to be placed on generate the stamped signature file in the original document.
Referring to Fig. 3, there is shown the preferred implementation method of verification step.As shown in the figure, verification step S2 may further include: extract substep S21, extract original document and E-seal from this stamped signature file; Original figure abstract extraction substep S22 extracts digital digest from the original document that extracts, the extracting method of digital digest can be identical with the extracting method in the stamped signature step; The seal digital digest extracts substep S23, extracts digital signature from E-seal, and extract digital digest from this digital signature, when specifically implementing, extracts digital digest by the PKI corresponding with the private key among the digital signature generation step S12; Checking substep S24 extracts the digital digest that extracts among the substep S23 with digital digest and the seal digital digest that extracts in the original figure abstract extraction substep 22 and compares, if identical, then be verified as correct, if difference then is verified as mistake.
Need to prove that said method also can carry out step S23 earlier, carries out step S22 again, the embodiment of the invention is not done any restriction to the sequencing of above-mentioned two steps.
As can be seen, the stamped signature step by digital watermark technology Information hiding such as digital signature on E-seal, make Information Authentication safer; In verification step, extract original document and E-seal the file behind stamped signature, and from original document and E-seal, extract digital digest respectively, and by two digital digests to recently original document being verified, guaranteed the authenticity and integrity of original document, avoided because the unnecessary loss that original document is made mistakes in the stamped signature process and caused.
Need to prove that the embodiment of the invention has provided the digital digest that extracts by contrast from original document and in the E-seal, come original document is verified; in fact; during concrete enforcement, other verification methods that people from this area knows also should be within protection scope of the present invention.
In the embodiment of the invention, E-seal is made among the UKEY in advance, and its concrete manufacture method can comprise the steps: seal picture obtaining step S31, obtains the pictorial information of original seal; Additional information is added step S32, the additional information of original seal is added in this pictorial information generates E-seal; Storing step S33 deposits E-seal and the digital certificate that obtains from CA certificate mechanism the UKEY in.Wherein, additional information can comprise Business Name, chapter date processed, authentication password etc.
By above-mentioned manufacturing process as can be seen, based on being accustomed to chapter of people, the embodiment of the invention combines traditional figure seal and modern cryptographic technique to produce E-seal and keep used Zhang Xiaoguo originally; In addition, the embodiment of the invention is provided with digital certificate in E-seal, digital certificate has increased fail safe and the validity of E-seal, make E-seal not rely on concrete business, can be freely in transmission over networks, the legitimacy of detected electrons seal allows two strange entities also can trust document or the transaction with legal E-seal in real time, makes that the range of application of this E-seal is more extensive.
Below in conjunction with Fig. 5 to Fig. 7 the signature method of the embodiment of the invention is done more detailed explanation.This method mainly comprises manufacturing process, the E-seal of E-seal affix one's seal process and the confirmation of secretarial document process of affixing one's seal.
Wherein, E-seal manufacturing process is key one ring in the embodiment of the invention, referring to Fig. 5, the making flow chart is specially: the seal bitmap file that at first obtains an original seal, fill in the accessory information of seal at this seal bitmap file, for example Business Name, chapter date processed, authentication password etc., last digital certificate and the seal bitmap file that obtains from ca authentication mechanism again is deposited into the UKEY the inside in the lump, so just the making E-seal based on UKEY that is over.
E-seal is affixed one's seal process referring to Fig. 6, by the stamped signature of activex control technology realization E-seal in the OFFICE original document of Microsoft.After the action triggers of affixing one's seal of control, if detect this moment computer plug UKEY, then can transfer picture and the additional information of E-seal by the UKEY interface.Original electronic document calculates digital digest by the SHA-1 algorithm, then by the encrypted private key digital digest, generates digital signature; Digital watermark technology is loaded into digital signature on the seal picture afterwards, again E-seal is added a cover original document at last and produces the document of affixing one's seal.
Affix one's seal the confirmation of secretarial document process referring to Fig. 7, and this process is just in time opposite with the process of affixing one's seal.As shown in the figure, extract the seal picture in original document and the E-seal earlier from the stamped signature file, extract digital digest then from the original document that extracts, the extracting method of digital digest also can be the SHA-1 algorithm; From E-seal, extract digital signature again, and from digital signature, extracting digital digest, the digital digest that will extract from original document compares with the digital digest that extracts from E-seal at last, if identical, then be verified as correctly, show that original document is not modified; If different, then be verified as mistake, show that original document is modified.
In addition, the embodiment of the invention can also comprise the database access function, with audit and the control that increases stamped signature come into force, function such as out-of-service time.
Referring to Fig. 8, when specifically implementing, the signature method in the embodiment of the invention can be realized the stamped signature of E-seal in the OFFICE original document by the activex control technology of Microsoft.After the E-seal control is installed on the client machine, open the toolbar that can occur a stamped signature behind the OFFICE, the operation that can carry out stamped signature very easily, test chapter by this toolbar.
By above-described embodiment as can be seen, compared with prior art, the present invention has following advantage:
One, the present invention is stored in E-seal among the UKEY, makes the use of E-seal more convenient;
Two, the employing digital watermark technology on E-seal, makes Information hiding such as digital signature Information Authentication safer;
Three, the electronic document after affixing one's seal is verified, guaranteed the authenticity and integrity of electronic document.
Four, make that by combining with technology such as the Acrobat of Activex technology, Adobe company, middleware Technology, PDF417 bar codes the range of application of E-seal is more extensive.
Electronic Seal System embodiment:
Referring to Fig. 9, there is shown the preferred embodiment of Electronic Seal System of the present invention.As shown in the figure, this system comprises stamped signature module 100 and authentication module 200 at least.
Wherein, stamped signature module 100 is used for transferring the E-seal that is made in UKEY in advance, and E-seal added to be placed on generates the stamped signature file in the original document; Authentication module 200 is used for the stamped signature file and extracts original original paper, and the original document that extracts is verified, to solve the problem that original document is made mistakes in the process of affixing one's seal, guarantees the authenticity and integrity of original document.
Particularly, be stored in E-seal among the UKEY in advance, during stamped signature, stamped signature module 100 is transferred earlier E-seal from UKEY, stamped signature module 100 can realize the stamped signature of E-seal in the OFFICE original document by the Activex technology of Microsoft, also can realize the stamped signature of E-seal in the PDF original document by Acrobat and the middleware Technology of using Adobe company; Whether the original document behind 200 pairs of stamped signatures of authentication module is verified make mistakes with check original document in the stamped signature process.
Because this sealing system is stored in E-seal among the UKEY, has not only avoided being stored in existing potential safety hazard in the server, also make the use of E-seal more convenient simultaneously; In addition, this system also verifies the original document behind the stamped signature, has solved the mistake that original document may occur in the stamped signature process, has guaranteed the authenticity and integrity of original document, has avoided unnecessary loss.
Referring to Figure 10, there is shown the preferred embodiment of stamped signature module 100.As shown in the figure, stamped signature module 100 comprises: digital digest acquiring unit 110, be used for extracting digital digest from original document, and when specifically implementing, can extract digital digest by SHA-1 algorithm (hash algorithm); Digital signature generation unit 120, be used for digital digest is encrypted the generation digital signature, and digital signature is loaded in the E-seal, during concrete enforcement, can be encrypted digital digest by private key, digital signature is loaded on the E-seal of transferring by digital watermark technology afterwards; Stamped signature file generating unit 130 is placed on original document generation stamped signature file for E-seal is added.
Referring to Figure 11, there is shown the preferred structure of authentication module 200.As shown in the figure, authentication module 200 comprises: extraction unit 210 is used for extracting original document and E-seal from the stamped signature file; Original figure abstract extraction unit 220 is used for extracting digital digest from the original document that extracts, and the extracting method of digital digest can be identical with the extracting method in the stamped signature step; Seal digital digest extraction unit 230 is used for extracting digital signature from E-seal, and extracts digital digest from digital signature, when specifically implementing, extracts digital digest by the PKI corresponding with the private key among the digital signature generation step S12; Checking subelement 240 compares for the digital digest that extracts in the digital digest that original figure abstract extraction substep is extracted and the seal digital digest extraction substep, if identical, then is verified as correctly, if difference then is verified as mistake.
Stamped signature module 100 by digital watermark technology Information hiding such as digital signature on E-seal, make Information Authentication safer.And the file of authentication module 200 behind stamped signature, extract original document and E-seal, and from original document and E-seal, extract digital digest respectively, and by two digital digests to recently original document being verified, guaranteed the authenticity and integrity of original document, avoided because the unnecessary loss that original document is made mistakes in the stamped signature process and caused.
Referring to Figure 12, the embodiment of the invention can also comprise the E-seal Prefabricated block, is used for E-seal is stored in UKEY in advance, specifically comprises: seal picture acquisition module 300, for the pictorial information that obtains original seal; Additional information is added module 400, is added into pictorial information for the additional information with original seal and generates E-seal; Memory module 500 is used for depositing E-seal and the digital certificate that obtains from CA certificate mechanism in UKEY.Wherein, additional information can comprise Business Name, chapter date processed, authentication password etc.
By above-mentioned manufacturing process as can be seen, based on being accustomed to chapter of people, the embodiment of the invention combines traditional figure seal and modern cryptographic technique to produce E-seal and keep used Zhang Xiaoguo originally; In addition, the embodiment of the invention is provided with digital certificate in E-seal, digital certificate has increased fail safe and the validity of E-seal, and make E-seal not rely on concrete business, can be freely in transmission over networks, the legitimacy of detected electrons seal allows two strange entities also can trust document or the transaction with legal E-seal in real time, makes that the range of application of this E-seal is wider
By the various embodiments described above as can be seen, this Electronic Seal System has mainly realized affixing one's seal of electronic document to Information hiding such as digital signature by digital watermark technology on E-seal and in conjunction with the use of UKEY, and the electronic document of affixing one's seal is carried out the function of integrity verification.
Because the Electronic Seal System in the embodiment of the invention is similar to above-mentioned electronic signature method principle, so relevant part can cross-reference.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. an electronic signature method is characterized in that, this method comprises the steps:
The stamped signature step is transferred the E-seal that is made in advance among the UKEY, and described E-seal added to be placed in the original document generates the stamped signature file;
Verification step extracts original original paper from described stamped signature file, and the original document that extracts is verified.
2. electronic signature method according to claim 1 is characterized in that, in the described stamped signature step, described E-seal added is placed on original document and further comprises:
Digital digest obtains substep, extracts digital digest from described original document;
Digital signature generates step, described digital digest is encrypted the generation digital signature, and described digital signature is loaded in the E-seal of transferring;
The stamped signature file generates step, described E-seal is added to be placed on generate the stamped signature file in the described original document.
3. electronic signature method according to claim 2 is characterized in that, described verification step comprises:
Extract substep, from described stamped signature file, extract original document and E-seal;
Original figure abstract extraction substep extracts digital digest from the original document that extracts;
The seal digital digest extracts substep, extracts digital signature from described E-seal, and extract digital digest from described digital signature;
The checking substep extracts the digital digest that extracts in the substep with the digital digest that extracts in the described original figure abstract extraction substep and described seal digital digest and compares, if identical, then be verified as correct, if difference then is verified as mistake.
4. electronic signature method according to claim 1 is characterized in that, in the described stamped signature step, described E-seal is made among the described UKEY as follows in advance:
Seal picture obtaining step obtains the pictorial information of original seal;
Additional information is added step, the additional information of described original seal is added in the described pictorial information generates E-seal;
Storing step deposits in the described UKEY with described E-seal with from the digital certificate that CA certificate mechanism obtains.
5. electronic signature method according to claim 4 is characterized in that, described additional information comprises: title, date and authentication password.
6. an Electronic Seal System is characterized in that, comprising:
Stamped signature module (100) is used for transferring the E-seal that is made in UKEY in advance, and described E-seal added to be placed on generates the stamped signature file in the original document;
Authentication module (200) is used for extracting original original paper from described stamped signature file, and the original document that extracts is verified.
7. Electronic Seal System according to claim 6 is characterized in that, described stamped signature module (100) comprising:
Digital digest acquiring unit (110) is used for extracting digital digest from described original document;
Digital signature generation unit (120) is used for described digital digest is encrypted the generation digital signature, and described digital signature is loaded in the E-seal of transferring;
Stamped signature file generating unit (130) is placed on described original document generation stamped signature file for described E-seal is added.
8. Electronic Seal System according to claim 7 is characterized in that, described authentication module (200) comprising:
Extraction unit (210) is used for extracting original document and E-seal from described stamped signature file;
Original figure abstract extraction unit (220) is used for extracting digital digest from the original document that extracts;
Seal digital digest extraction unit (230) is used for extracting digital signature from described E-seal, and extracts digital digest from described digital signature;
Checking subelement (240), compare for the digital digest that extracts in the digital digest that described original figure abstract extraction substep is extracted and the described seal digital digest extraction substep, if identical, then be verified as correct, if different, then be verified as mistake.
9. Electronic Seal System according to claim 6 is characterized in that, described Electronic Seal System also comprises:
Seal picture acquisition module (300) is for the pictorial information that obtains original seal;
Additional information is added module (400), is added into described pictorial information for the additional information with described original seal and generates E-seal;
Memory module (500) is used for depositing described UKEY in described E-seal with from the digital certificate that CA certificate mechanism obtains.
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| CN2013102040475A CN103259665A (en) | 2013-05-28 | 2013-05-28 | Method and system of electronic signature |
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| CN2013102040475A CN103259665A (en) | 2013-05-28 | 2013-05-28 | Method and system of electronic signature |
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| CN110532808A (en) * | 2019-08-20 | 2019-12-03 | 江西金格科技股份有限公司 | A kind of electronic signature method based on electronic document image object |
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| CN104766172A (en) * | 2015-04-15 | 2015-07-08 | 上海辉印电子科技有限公司 | Verifiable seal mold obtaining method |
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Application publication date: 20130821 |