CN104463021A - High-safety electronic-signature tampering preventing system - Google Patents
High-safety electronic-signature tampering preventing system Download PDFInfo
- Publication number
- CN104463021A CN104463021A CN201410707990.2A CN201410707990A CN104463021A CN 104463021 A CN104463021 A CN 104463021A CN 201410707990 A CN201410707990 A CN 201410707990A CN 104463021 A CN104463021 A CN 104463021A
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- Prior art keywords
- data
- signature
- pddl
- document
- ciphertext
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/80—Creating or modifying a manually drawn or painted image using a manual input device, e.g. mouse, light pen, direction keys on keyboard
Abstract
The invention relates to a high-safety electronic-signature tampering preventing system. The high-safety electronic-signature tampering preventing system comprises a PDDL conversion device, a picture generation device, a signature identifying device and a PDF conversion device, wherein the PDDL conversion device is used for converting handling form data into PDDL data, the picture generation device is used for generating a handling form picture according to the PDDL data, the signature identifying device is used for identifying a handwritten signature of a user, and the PDF conversion device is used for converting the handling form picture generated after the user carries out handwriting signing into a PDF file. Generation of the common handling form data picture is supported by defining a PDDL data protocol, handwriting signing is directly carried out on the picture, the handwriting signature can be directly seen, the signature data are not stored, direct synthesis is carried out, the signature safety is improved, office automatization and electronization document management are achieved, and the aims of saving energy and reducing emission are achieved.
Description
The application is application number is 201210202613.4, and denomination of invention is " a kind of high security tamper-resistant system for electronic signature ", and the applying date is the divisional application on June 19th, 2012
Technical field
The present invention relates to communication technical field, particularly relate to a kind of high security tamper-resistant system for electronic signature.
Background technology
The handwritten signature accepted based on intelligent terminal platform service requires to be applied to the handwritten signature on service handling list, finishing service accept confirmation.Prior art generally adopts peripheral hardware to provide support and is applied on unintelligent terminal platform, is not the handwritten signature of the platform based on intelligent terminal, and corresponding what mention is peripheral hardware or all need equipment support.
Such as, application number is CN201110255294, the Chinese patent application that denomination of invention is " a kind of pressure-induction handwriting display screen " discloses a kind of pressure-induction handwriting display screen, comprise flat-panel monitor, handwriting pad and writing pencil, flat-panel monitor comprises display panel and backboard, display panel is fixed on backboard, backboard has the opening matched with handwriting pad size, and handwriting pad to be embedded in opening and to be fixed on the bottom of display panel.Writing pencil is pressure sensitive writing pencil.Technique effect of the present invention is, handwriting pad is increased at the display screen back side, in the regulation region of display, use pressure sensi-tive pen effectively to sign electronically, hand-written book goes out to have the electronic signature of pressure sensitivity effect, make electronic signature the same with traditional handwritten signature effect, again reduce the operation cost of bank.It is simple that the present invention has structure, and have nature directly perceived, high reading speed and high precision, achieve the features such as trustworthy signature audit function, be applicable to various self-aided terminal, ATM, VTM machine.
Application number is CN200510027649, the Chinese patent application that patent name is " document digital signature and realize the method for E-seal and handwritten signature " discloses a kind of document digital signature and realizes the method for E-seal and handwritten signature, and wherein this digital signature method comprises secured environment initialization operation, generates the verification operation of digital signing operations and digital signature; The method of this E-seal comprises this signature of checking or stamped signature is effective, obtain current document needs the position of stamped signature, selects seal, inserts seal picture and carry out digital signature to document; The method of this handwritten signature comprise this signature of checking or seal effectively, start handwriting input device and initialization, to obtain from clipbook handwritten input information, selected insert handwritten signature position, handwritten input information inserted document, obtain certificate that active user holds, digital signature carried out to document.Adopt this kind of method, security is higher, and handwritten signature, together with digital signature tight binding, together constitutes a complete computer document secure certification architecture, enhances the scope of application, simultaneously fast very convenient to its operating process of user.
There is following defect in existing technical data transmission: 1) only provides peripheral hardware hardware supported, can not combine with existing intelligent terminal platform.2) can not support that general service handling free hand drawing sheet generates, to complete after Signature Confirmation integrally, What You See Is What You Get, the data of signature and original data can only be synthesized, may there is the risk that signed data is stolen, security also reduces greatly.
Summary of the invention
In order to solve the technical matters that in prior art, signed data security is lower, the present invention proposes a kind of high security tamper-resistant system for electronic signature, comprising:
PDDL conversion equipment, will accept forms data for data and be converted to PDDL data;
Photograph creation device, for accepting free hand drawing sheet according to PDDL data genaration;
Signature recognition device, for identifying the handwritten signature of user;
PDF conversion equipment, is converted to pdf document for the free hand drawing sheet that accepts after user is carried out handwritten signature.
Described photograph creation device, for resolving PDDL data; Judge whether that the overall situation is arranged, if so, the overall situation has been set, performed next step and judge, if not, directly performed next step and judge; Judge whether blocks of data device, if so, performed next step and judge, if not, generate and accept free hand drawing sheet; Judged whether blocks of data device, if so, carried out localized mass setting, rear execution next step, if not, directly perform next step; Get blocks of data, generate and accept free hand drawing sheet.
Described PDDL data comprise two parts, a part is that the overall situation is arranged, a part is that blocks of data and block are arranged, and concrete attribute kit contains: whether underscore, whether runic, whether highlight, font size, alignment thereof, line space, word space, accept single print What display mode for mark.
Described signature recognition device, for the coordinate by recording current touch screen point, in touch screen moving process, trigger current touch screen coordinate to change, and then draw from memory coordinate to this coordinate line, new record of laying equal stress on memory coordinate, the thickness of line passes through screen calculation of pressure, until touch screen terminates.
System also comprises encryption device, for being encrypted described PDF document, adopts hash value to calculate the MD5 value of PDF document; DES3 encryption is carried out to described MD5 value, obtains ciphertext; Ciphertext value is write in pdf document.
Described encryption device, for ciphertext being filled into latter 128 of document flow, filling less than 128, with special character and forming new document flow and write together in database, is formed one sign after document.
System also comprises calibration equipment, for verifying the PDF document after described encryption, takes out pdf document stream from database; By DES3 decrypting ciphertext, reduction generates MD5 value; Hash cryptographic hash calculation document MD5 value is adopted to remaining document flow; Relatively whether two MD5 values are identical, and as identical, then document is not tampered.
Described calibration equipment, takes out ciphertext for rear 128 characters from document flow, from 128, obtains ciphertext.
High security tamper-resistant system for electronic signature of the present invention, by definition PDDL data protocol, support that the general forms data picture that accepts generates, and directly on picture, carry out handwritten signature, What You See Is What You Get, do not preserve signed data, direct synthesis, improves the security of signature, achieves non-support cable, electronization data management, reaches energy-saving and emission-reduction object.
Accompanying drawing explanation
Fig. 1 is the structural drawing of high security tamper-resistant system for electronic signature of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
As shown in Figure 1, the present invention proposes a kind of high security tamper-resistant system for electronic signature and comprises:
PDDL conversion equipment, will accept forms data for data and be converted to PDDL data;
Photograph creation device, for accepting free hand drawing sheet according to PDDL data genaration;
Signature recognition device, for identifying the handwritten signature of user;
PDF conversion equipment, is converted to pdf document for the free hand drawing sheet that accepts after user is carried out handwritten signature.
Described photograph creation device, for resolving PDDL data; Judge whether that the overall situation is arranged, if so, the overall situation has been set, performed next step and judge, if not, directly performed next step and judge; Judge whether blocks of data device, if so, performed next step and judge, if not, generate and accept free hand drawing sheet; Judged whether blocks of data device, if so, carried out localized mass setting, rear execution next step, if not, directly perform next step; Get blocks of data, generate and accept free hand drawing sheet.
Described PDDL data comprise two parts, a part is that the overall situation is arranged, a part is that blocks of data and block are arranged, and concrete attribute kit contains: whether underscore, whether runic, whether highlight, font size, alignment thereof, line space, word space, accept single print What display mode for mark.
Described signature recognition device, for the coordinate by recording current touch screen point, in touch screen moving process, trigger current touch screen coordinate to change, and then draw from memory coordinate to this coordinate line, new record of laying equal stress on memory coordinate, the thickness of line passes through screen calculation of pressure, until touch screen terminates.
System also comprises encryption device, for being encrypted described PDF document, adopts hash value to calculate the MD5 value of PDF document; DES3 encryption is carried out to described MD5 value, obtains ciphertext; Ciphertext value is write in pdf document.
Described encryption device, for ciphertext being filled into latter 128 of document flow, filling less than 128, with special character and forming new document flow and write together in database, is formed one sign after document.
System also comprises calibration equipment, for verifying the PDF document after described encryption, takes out pdf document stream from database; By DES3 decrypting ciphertext, reduction generates MD5 value; Hash cryptographic hash calculation document MD5 value is adopted to remaining document flow; Relatively whether two MD5 values are identical, and as identical, then document is not tampered.
Described calibration equipment, takes out ciphertext for rear 128 characters from document flow, from 128, obtains ciphertext.
High security tamper-resistant system for electronic signature of the present invention, by definition PDDL data protocol, support that the general forms data picture that accepts generates, and directly on picture, carry out handwritten signature, What You See Is What You Get, do not preserve signed data, direct synthesis, improves the security of signature, achieves non-support cable, electronization data management, reaches energy-saving and emission-reduction object.
It is noted that above embodiment is only in order to illustrate the present invention and unrestricted, the present invention is also not limited in above-mentioned citing, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in right of the present invention.
Claims (5)
1. a high security tamper-resistant system for electronic signature, is characterized in that, comprising:
PDDL conversion equipment, will accept forms data for data and be converted to PDDL data;
Photograph creation device, for accepting free hand drawing sheet according to PDDL data genaration;
Signature recognition device, for identifying the handwritten signature of user; Described signature recognition device, for the coordinate by recording current touch screen point, in touch screen moving process, trigger current touch screen coordinate to change, and then draw from memory coordinate to this coordinate line, new record of laying equal stress on memory coordinate, the thickness of line passes through screen calculation of pressure, until touch screen terminates;
PDF conversion equipment, is converted to pdf document for the free hand drawing sheet that accepts after user is carried out handwritten signature.
2. high security tamper-resistant system for electronic signature according to claim 1, is characterized in that, described photograph creation device, for resolving PDDL data; Judge whether that the overall situation is arranged, if so, the overall situation has been set, performed next step and judge, if not, directly performed next step and judge; Judge whether blocks of data device, if so, performed next step and judge, if not, generate and accept free hand drawing sheet; Judged whether blocks of data device, if so, carried out localized mass setting, rear execution next step, if not, directly perform next step; Get blocks of data, generate and accept free hand drawing sheet;
Described PDDL data comprise two parts, a part is that the overall situation is arranged, a part is that blocks of data and block are arranged, and concrete attribute kit contains: whether underscore, whether runic, whether highlight, font size, alignment thereof, line space, word space, accept single print What display mode for mark.
3. high security tamper-resistant system for electronic signature according to claim 1, is characterized in that, also comprise encryption device, for being encrypted described PDF document, adopts hash value to calculate the MD5 value of PDF document; DES3 encryption is carried out to described MD5 value, obtains ciphertext; Ciphertext value is write in pdf document.
4. high security tamper-resistant system for electronic signature according to claim 3, it is characterized in that, described encryption device, for ciphertext being filled into latter 128 of document flow, fill the new document flow of formation to write together in database less than 128, with special character, form the document after a signature.
5. high security tamper-resistant system for electronic signature according to claim 4, is characterized in that, also comprise calibration equipment, for verifying the PDF document after described encryption, takes out pdf document stream from database; By DES3 decrypting ciphertext, reduction generates MD5 value; Hash cryptographic hash calculation document MD5 value is adopted to remaining document flow; Relatively whether two MD5 values are identical, and as identical, then document is not tampered; Described calibration equipment, takes out ciphertext for rear 128 characters from document flow, from 128, obtains ciphertext.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707990.2A CN104463021A (en) | 2012-06-19 | 2012-06-19 | High-safety electronic-signature tampering preventing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410707990.2A CN104463021A (en) | 2012-06-19 | 2012-06-19 | High-safety electronic-signature tampering preventing system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210202613.4A Division CN102799809B (en) | 2012-06-19 | 2012-06-19 | Tamper-resistant system for electronic signature |
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| Publication Number | Publication Date |
|---|---|
| CN104463021A true CN104463021A (en) | 2015-03-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201410707990.2A Pending CN104463021A (en) | 2012-06-19 | 2012-06-19 | High-safety electronic-signature tampering preventing system |
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| CN (1) | CN104463021A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108038449A (en) * | 2017-12-14 | 2018-05-15 | 广东德生科技股份有限公司 | A kind of with no paper electric endorsement method and system |
| CN113282963A (en) * | 2020-02-20 | 2021-08-20 | 中国移动通信集团重庆有限公司 | Electronic signature verification method, device and equipment |
Citations (4)
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| US6539363B1 (en) * | 1990-08-30 | 2003-03-25 | Ncr Corporation | Write input credit transaction apparatus and method with paperless merchant credit card processing |
| US20050289059A1 (en) * | 2004-06-28 | 2005-12-29 | Brewington James G | Apparatus, system, and method for presenting a document image together with a manual signature |
| CN101599011A (en) * | 2008-06-05 | 2009-12-09 | 北京书生国际信息技术有限公司 | DPS (Document Processing System) and method |
| CN101609488A (en) * | 2008-06-18 | 2009-12-23 | 上海格尔软件股份有限公司 | Electric endorsement method based on screen capture technology |
-
2012
- 2012-06-19 CN CN201410707990.2A patent/CN104463021A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6539363B1 (en) * | 1990-08-30 | 2003-03-25 | Ncr Corporation | Write input credit transaction apparatus and method with paperless merchant credit card processing |
| US20050289059A1 (en) * | 2004-06-28 | 2005-12-29 | Brewington James G | Apparatus, system, and method for presenting a document image together with a manual signature |
| CN101599011A (en) * | 2008-06-05 | 2009-12-09 | 北京书生国际信息技术有限公司 | DPS (Document Processing System) and method |
| CN101609488A (en) * | 2008-06-18 | 2009-12-23 | 上海格尔软件股份有限公司 | Electric endorsement method based on screen capture technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108038449A (en) * | 2017-12-14 | 2018-05-15 | 广东德生科技股份有限公司 | A kind of with no paper electric endorsement method and system |
| CN113282963A (en) * | 2020-02-20 | 2021-08-20 | 中国移动通信集团重庆有限公司 | Electronic signature verification method, device and equipment |
| CN113282963B (en) * | 2020-02-20 | 2023-04-07 | 中国移动通信集团重庆有限公司 | Electronic signature verification method, device and equipment |
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| C06 | Publication | ||
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Application publication date: 20150325 |