WO2009036619A1

WO2009036619A1 - Credit mark random dermal ridge generating method

Info

Publication number: WO2009036619A1
Application number: PCT/CN2007/003395
Authority: WO
Inventors: Jianming Wu
Original assignee: Jianming Wu
Priority date: 2007-09-17
Filing date: 2007-11-30
Publication date: 2009-03-26
Also published as: CN100518064C; CN101163007A

Abstract

A credit mark random dermal ridge generating method is provided. The method comprises: preparing an electronic file needing subscribing a credit mark pattern in a computer system (111); regarding the content of the electronic file as a data resource; calculating hash values by inputting a hash function (120); encrypting the hash values by asymmetric secret key (namely public key encryption algorithm) (130) so as to attain digital signature values (140); arranging and distributing the digital signature values into a number pattern according to the geometry of the credit mark pattern (160); overlaying the number pattern on the credit mark pattern; regarding the overlaid part between the number strokes of the number pattern and the graphics context of the credit mark as dermal ridge track so as to form the credit mark random dermal ridge of the digital signature (170).

Description

Credit identification random ridge generation method

The invention relates to a credit document anti-counterfeiting technology, in particular to a digital signature credit identification random ridge generation method in the implementation of e-government and e-commerce. Background technique

In human society, there is a need for exchange of interests between people. In the exchange of interests, it is often necessary to use a certificate with a credit mark, that is, the "seal document" or "used by the word". Signature document".

The Chinese government stipulates that "the document is stamped into effect". There are a large number of documents to be stamped in the government work, and a large number of contracts are required to be stamped in the business work of enterprises.

Other countries have such regulations, such as the use of seals or emblems, or the use of personal signatures.

American Assurance Classics The Rules of the Federal Rules of Evidence 902 stipulates that: Sealed domestic official documents have admissibility and also define the principle that “documents are stamped into force”.

In ordinary life, our common seal or emblem is just a unit, institution or an individual. This seal or emblem is in use, only shows the name of a unit, institution, or individual. There is no data on the contents of the signed document. Sexual contact.

The seals, emblems, or personal signatures described above are collectively referred to as the “trust identifiers”.

In the face of high-tech components such as modern high-precision scanners, computer image processing software, automatic engraving machines, and photosensitive exposure machines, seals and emblems are easily scanned, copied, and copied, and the copied patterns are consistent and cannot be identified.

Personal signatures can also be imitated, so that it is difficult to distinguish between true and false.

In the promotion practice of global e-government and e-commerce, the traditional seal and personal signature credit identification method can be incorporated into the computer information technology of modern office, using the electronic signature technology of image processing, the seal, the emblem, the individual Signed electronic image file Insert into an electronic file, and then print the electronic file with the seal, emblem, and personal signature together using a digital graphic printing device (such as a color printer) under computer control.

However, the electronic images of the seals, emblems, and personal signatures signed under this method are more easily scanned and copied once they are printed on paper shield files by computer-controlled digital graphic printing equipment (such as various color printers). It is impossible to identify the authenticity.

At the same time, with the development of computer information technology, people basically rely on computers and "printers" to edit and print documents. People's expressions of ideas and meanings, through the processing of computers, also have two forms of file representation. That is, electronic documents and supporting printed paper documents.

Accompanied by the popularity of electronic documents, it is the generation of credit authentication methods for electronic documents, that is, digital signatures. The countries of the world have successively promulgated relevant laws to confirm the evidence ability of digital signatures. The Electronic Signature Law of the People's Republic of China was also in 2005. Implementation.

A computer electronic file can provide valid evidence through digital signature technology. However, the security authentication technology supports the identification of authenticity of paper documents using physical, chemical, and pattern recognition methods. In judicial practice, there are often cases where the credit identification of a document is difficult to distinguish, such as: The seals in the two contracts cannot be judged under the pattern recognition, but the contents of the contract are inconsistent, in one file. The personal signature also triggers a true and false argument.

Because the documents printed by computer-controlled graphic printing equipment have no obvious features and high consistency, in the judicial evidence collections of countries all over the world, there are no features of copying machine copying and printer printing of documentary evidence because of lack of exclusive evidence. None of them are accepted.

There are a large number of illegal small advertisements in China's urban and rural areas, and the existence of illegal activities of forged documents and documents in various countries, from the reverse, the backwardness of the anti-counterfeiting technology of existing paper documents.

A seal, emblem, or personal signature is a credit mark of a legal person or natural person. The forgery of a credit mark infringes upon the interests of others and undermines the normal operation of state management and social economy. Summary of the invention

In order to solve the above problems and technical defects, the present invention provides a credit identification random ridge generation method, which can enable a digital signature signed on a paper to carry a digital signature random digital ridge with a unique pattern feature, thereby effectively preventing and identifying And crack down on criminal acts of forging credit documents.

The invention is achieved by the following technical solutions:

A credit identification random ridge generation method:

Prepare an electronic file to be signed in the computer system, select its format file or plain text as the data source, input the hash function to calculate the binary hash value, and encrypt it with the asymmetric key (public key encryption algorithm). The hash value obtains a binary digital signature value, and the set of digital signature values are arranged in a digital pattern according to the geometric shape of the credit identification pattern, and are superimposed on the credit logo graphic pattern, the digital strokes and credits of the digital pattern The overlapping intersections of the graphics in the logo pattern are used as ridge tracks to form a digital signature credit identifier random ridge.

The long digital signature value is calculated again by using a hash function to obtain a short hash value, and the set of hash values are arranged in a digital pattern according to the geometric pattern of the credit identification pattern, and are superimposed on the credit logo graphic pattern. The overlapping intersection of the digital stroke digital drawing and the credit identification graphic is used as a trajectory to form a digital signature credit identification random ridge.

The binary hash value calculated by directly inputting the format file or plain text of the electronic file to be signed as the data source into the hash function, and distributing the digital hash pattern according to the geometric shape of the credit identification pattern, and overlaying the credit identification map Above the text pattern, the overlapping portion of the digital stroke of the digital pattern and the graphic in the credit identification pattern serves as a trajectory of the ridge to form a random ridge of the credit mark.

Converting a binary value into a decimal or hexadecimal number, arranged in a digital pattern according to the geometric shape of the credit identifier, and superimposed on the credit logo graphic pattern, the overlap of the digital pattern stroke and the credit logo graphic The intersecting portion acts as a trajectory to form a digital signature credit identification random ridge.

The visual color of the stroke in which the digital stroke in the generated digital signature random tiling pattern and the credit identification graphic do not overlap, is consistent with the background color of the credit identification graphic pattern; the digital stroke and the credit identifier in the generated random ridge pattern The overlap of the intersecting strokes of the graphic Color, forming a visual color difference with the primary color of the credit logo graphic pattern.

The visual color of the digital stroke in the generated digital signature random tiling pattern is consistent with the background color of the credit identification graphic pattern.

The interception, word-by-word extraction method can be used to shorten the numerical length of the generated digital pattern. A system for generating a credit identification random line includes the following devices:

The input and computing device is configured to prepare an electronic file to be signed in the computer system, select a format file or plain text as a data source, input a hash function to calculate a hash value, and use an asymmetric key ( The public key encryption algorithm) encrypts the hash value to obtain a binary digital signature value;

A random ridge generating device is configured to form a hash value or a digital signature value to form a credit identification random ridge.

The random ridge generation device further includes the following devices:

a device for arranging the digital value of the hash value or the digital signature value in a digital pattern according to the geometric shape of the credit identification pattern, and superimposing on the credit logo graphic pattern, the digital stroke and the credit identification pattern of the digital pattern The overlapping intersection of the middle picture and the text is used as a trajectory to form a digital signature credit identification random ridge.

The random ridge generation device further includes the following devices:

a device for recalculating a longer digital signature value using a hash function to obtain a shorter hash value; arranging the set of binary hash values in a digital pattern according to a credit identifier pattern geometry, Above the credit logo graphic pattern, the overlapping portion of the digital stroke digital signature and the credit identification graphic is used as a trajectory, and the digital signature credit identifier is a random ridge.

The random ridge generating device further includes the following devices: arranged in a digital pattern according to the geometric shape of the credit identification pattern, and superimposed on the credit identification pattern, the overlapping portion of the digital stroke of the digital pattern and the graphic in the credit identification pattern as a pattern Line trajectory, forming a random line of credit identification.

The random ridge generation device further includes the following devices:

a device for converting a binary value into a decimal or hexadecimal number, arranged in a digital pattern according to the geometric shape of the credit identification pattern, and stacked on the letter On the top of the logo pattern, the overlapping portion of the digital stroke of the digital pattern and the graphic image in the credit logo pattern serves as a trajectory to form a credit line random ridge.

The random ridge generation device further includes the following devices:

a device, the digital stroke in the digital signature random ridge pattern is not overlapped on the credit identification graphic, and the visual color of the intersecting stroke is consistent with the background color of the credit identification graphic pattern; the digital stroke in the generated random ridge pattern The color of the overlapping intersecting strokes on the credit identification graphic forms a visualized color difference with the credit identification graphic pattern primary colors.

The random ridge generation device further includes the following devices:

A device for visual color of a digital stroke in a generated digital signature random tiling pattern that coincides with a background color of a credit identification graphic pattern.

The random ridge generation system also includes the following devices:

A device for shortening the length of a digital pattern generated using a method such as interception, word-by-word extraction, or the like.

A method for inspecting a method for generating a random ridge of a credit identification, the anti-counterfeiting inspection steps are as follows: Step 1: Digitally scan a document printed on a medium such as a paper with a credit mark.

Step 2: Zoom in to see the image of the credit mark (such as seal) obtained by scanning, to see if there is a trajectory, if it is not, it is forged; if it is, continue.

Step 3: Obtain the hash value of the electronic document or the plain text of the document in the format of the credit identification file, use the digital certificate of the credit identifier signer, and regenerate according to the generation parameters and rules of the original credit identifier "random digital line" The credit identification of "random digital lines,,.

Step 4: Make this set of “random digital lines” and overlay them on the credit mark to be verified. Observe the coincidence of the track traces. If the line tracks overlap, the credit mark (such as seal stamp) is true.

A system for inspecting a method for generating a credit line random ridge line, comprising the following means: an input device for digitally scanning a document printed by a shield such as a paper with a credit mark. The identification device is used to enlarge the image of the credit mark (such as stamp) obtained by scanning, to see if there is a trajectory, and if it is not, it is regarded as forgery; if there is, continue.

a generating device, configured to obtain a hash value of a format electronic file of the credit identification file or a plain text of the file, and encrypt the hash with an asymmetric key of the digital certificate of the credit identification unit Value, according to the credit parameter "random number line" generation parameter and 'rule, regenerate the "random number line" for this credit.

The identification device is used to make the set of "random digital lines" and is superimposed on the credit mark to be verified to observe the coincidence of the track traces, and the credit marks (such as seal stamps) are true when the track tracks are coincident. DRAWINGS

1 is a flow chart of generating a credit signature digital signature random ridge line;

Figure 2 is a credit identification pattern or graphic diagram to be used;

Figure 3 is a diagram of a visible credit identification of a complete random digital line overlay;

Figure 4 is a complete digital signature random line credit identification map;

Figure 5 is a cross-sectional representation of a truncated random digital line overlay; and Figure 6 is a truncated digital signature random line credit identification. detailed description

The invention relates to a method for generating a random identification line of credit identifiers. The following describes in detail how the invention is implemented with reference to the accompanying drawings:

As shown in Figure 1:

Preparing a computer electronic file to be signed in step 111 in the computer system; preparing an electronic image of the pending credit identification pattern (such as an overprint stamp) step 112; using the electronic file content of step 111 as a data source, inputting The column function computes a hash value step 120; encrypting this hash value step 130 using an asymmetric key in the RSA or ECC digital signature technology architecture; obtaining a digital signature value step 140.

Under normal conditions, the digital signature value data is relatively long, such as: RSA signature value is 1024bit. Due to the limited geometric area of the credit logos (such as seals) we use every day, the data generated by the digital pattern is too long, and there are many characters. The more characters in the limited geometric area of the seal, the smaller the character size, resulting in a trajectory. Unclear, or will destroy the integrity of the credit logo graphic, in order to not destroy the integrity of the effective content of the credit logo and improve the clarity of the trajectory, you can use the hash function to calculate the set of longer digital signature values. A shorter hash value step 150, such as 160 bits. The digital signals generated in step 140 or step 150 are arranged in a digital signature digital pattern in accordance with the credit identifier geometry, and an electronic image step 112 is performed using the ready-to-use credit identification pattern (such as an overprint stamp). Step 160 The generated digital signature digital pattern is superimposed on the electronic image of the credit identification pattern in step 112, 171 of FIG. 3, and 173 of FIG. 5, so that the strokes in the digital signature digital pattern are cut through the visible text of the credit identification, forming The credit identification digital signature random ridge, 172 of FIG. 4, 174 of FIG. 6, generates a digital signature random ridge credit identification step 170.

Using the above technical method, we can observe the schematic diagram of the visual digital signature random line credit identification pattern, 171 of Figure 3, 173 of Figure 5, the digital signature of the actual application signed in the credit file, the random line credit identification pattern is 172 of Fig. 4 and 174 of Fig. 6.

If you want to further improve the clarity of the trajectory, you can use the methods of interception, word extraction, etc. to shorten the length of the hash value, such as using a set of 40 hexadecimal hash values of the first 20 digits, reduce characters The quantity, the character size is enlarged, and the degree of clarity of the trajectory is improved without destroying the integrity of the effective content of the printed matter, 173 of Fig. 5 and 174 of Fig. 6.

Figure 3 is a visible credit identification diagram of a complete random digital line overlay. As shown, the digital digits of the digital pattern in the figure are 40 hexadecimal numbers.

Figure 4 is a credit map of the complete random digital line cut. As shown in the figure, the non-red line in the figure is the intersection of random digital lines.

Figure 5 is a simplified credit identification diagram of a truncated random digital line overlay. As shown, the digital digits of the digital pattern in the figure are 20 hexadecimal digits.

Figure 6 is a diagram of the credit identification of the truncated random digital line cut. As shown, the non-red line in the figure is the intersection of the random digital lines.

The part where the digital pattern stroke and the credit logo graphic do not overlap, the color corresponding to the background color of the credit logo graphic is used, and the overlapped part uses other colors different from the primary color of the credit logo to form a visual color difference, thereby forming a credit A visible ridge track is formed on the logo image, such as a purple color similar to the red color of the seal stamp of FIGS. 3 to 6.

It is also possible to use a color that matches the background color of the credit logo graphic. For example, when printing a document on white paper, the background color of the credit logo graphic is white, which can be considered as colorless, and the digital pattern stroke is defined as colorless; for example, part of Europe The country uses black paper to print documents, The background color of the credit logo graphic is black, and the digital pattern stroke is defined as black; this method forms a visual chromatic aberration, which is beneficial for observation and comparison check. With this method, the digital font should be thinner to avoid damage to the credit logo. The original shape of the text.

The legal basis and test method for the above-mentioned credit identification digital signature random ridges are as follows:

The legal basis for the authenticity verification of digital signatures for credit identification is the Electronic Signature Law of each country and the digital certificate used in accordance with the legal basis of the Electronic Signature Law. The judicial evidence chain is as follows:

According to the Electronic Signature Law of each country, a legal person institution using secure electronic signature technology must have a valid digital certificate issued by a legal digital certification company (CA company).

According to the technical solution of the patent application, a document requiring a credit identification must have a hash value of the content of the document, and the credit identifier must have a digital signature random number line.

Under the technical solution of the patent application, the counterfeiter forges a credit identification document, and must also forge a set of digital signature random digital lines in the credit identification.

In the secure hash function operation, the contents of the file are unchangeable; digital signatures using a valid digital certificate are undeniable, and the order in which the numbers are arranged is unique and non-repeatable.

The digital signature digital and digital signature random digital lines generated by the real file must be coincident; the digital signature character lines in the fake document credit identifier must not coincide.

The anti-counterfeiting test steps are as follows

Step 1: Set the normal scanner 600DPI and above, RGB color scan stamp printing.

Step 2: Zoom in to view the scanned image obtained by scanning to see if there is a trajectory. If it is not, it is regarded as forgery; if it is, continue.

Step 3: Obtain the hash value of the electronic document or the plain text content of the credit identification document, use the digital certificate of the credit identifier signer, and regenerate the credit according to the generation parameters and rules of the credit identifier "random digital line" The "random digital line" of the logo.

Step 4: Make this set of "random digital lines" and stack them on the credits that need to be verified. W recognize the above, observe the coincidence of the trajectory of the ridge, and the credit mark (such as the seal) is true when the trajectory of the ridge is coincident.

According to the technical principle of the "electronic signature law", the digital signature system composed of a hash function and an asymmetric key (public key encryption algorithm) is applied to the effective authentication of paper documents, and unified in the era of computer information. The electronic document and paper document authentication method of the document solves the problem that the computer-edited printed paper documents that are ubiquitous in the world are difficult to be authenticated.

The technical scheme of the invention forms a set of random ridge pattern formed by a digital signature digital having a unique data relationship with the document content on the credit identifier of the paper document, and maintains the original graphic features of the credit logo, so that the credit logo displays the legal person The basic characteristics of institutions and natural persons are closely combined with the contents of the documents, reaching one text, one standard, one grain and one code. In paper documents, the exclusive evidence chain of the document content is not modifiable and the identity of the signer is undeniable. The digital signature technology system conducts effective technical inspection of credit marks, which can prevent criminal acts of pseudo-paper quality credit documents, strengthen social management, and safeguard the interests of legitimate holders of credit labels.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. All modifications are intended to be included within the scope of the invention, and the scope of the invention should be construed as the scope of the claims.

Claims

Rights request:

A credit sign random ridge generation method, characterized in that an electronic file to be signed in a credit identification pattern is prepared in a computer system, a format file or plain text is selected as a data source, and a hash function is input to calculate a binary The hash value is encrypted with an asymmetric key to obtain a binary digital signature value, and the set of digital signature values are arranged in a digital pattern according to the geometric shape of the credit identification pattern, and are superimposed on the credit logo graphic pattern. The overlapping portion of the digital stroke of the digital pattern and the graphic in the credit identification pattern is used as a trajectory to form a digital signature credit identification random ridge.

2. The credit identification random ridge generation method according to claim 1, wherein the long digital signature value is calculated again using a hash function to obtain a short hash value, and the set of hash values is followed by a credit identifier. The pattern geometric shapes are arranged in a digital pattern, and are superimposed on the credit logo graphic pattern. The overlapping portion of the digital stroke digital signature and the credit identification graphic is used as a trajectory to form a digital signature credit identification random ridge.

The method for generating a credit identifier random ridge according to claim 1, wherein the format file or the plain text of the electronic file to be signed as the data source is input as a data source and the binary hash is calculated by the hash function. Values are arranged in a digital pattern according to the geometric shape of the credit identification pattern, and are superimposed on the credit logo graphic pattern. The overlapping intersection of the digital strokes of the digital pattern and the graphic in the credit identification pattern serves as a trajectory to form a credit. Identify random lines.

4. The credit identification random ridge generation method according to claim 1, claim 2 or claim 3, wherein the binary value is converted into a character represented by a decimal number or a hexadecimal number according to a credit identifier geometry The arrangement is distributed into a digital pattern, and is superimposed on the credit logo graphic pattern. The overlapping portion of the digital stroke digital signature and the credit identification graphic is used as a trajectory to form a digital signature credit identification random ridge.

5. The method of claim 1, claim 2, claim 3 or claim 4 a method for generating a random identification line of credit identification, characterized in that a visual color of a stroke in which the digital stroke and the credit identification graphic in the generated random ridge pattern do not overlap intersect with the background color of the credit identification graphic pattern; The color of the stroke intersecting the overlapping of the digital stroke and the credit logo graphic in the ridge pattern forms a visual chromatic aberration with the primary color of the credit logo graphic pattern.

6. The credit identification random ridge generation method according to claim 1, claim 2, claim 3 or claim 4, wherein the visual color of the digital stroke in the generated random ridge pattern and the credit identification map The background color of the pattern is the same.

The method for generating a credit identification random ridge according to claim 1, claim 2, claim 3 or claim 4, wherein the length of the numerical value of the generated digital pattern can be shortened by using a clipping and word separating method.

8. A system for generating a credit identification random ridge, comprising the following means: input and computing means for preparing an electronic file to be signed in a computer system to be signed, and selecting a format file or plain text As a data source, the input hash function computes a hash value, and encrypts the hash value with an asymmetric key to obtain a binary digital signature value;

The random ridge generating device is configured to arrange the digital value of the hash value or the digital signature value into a random identification digital line pattern of the credit identifier.

9. The system for generating a credit identification random ridge according to claim 8, wherein the random ridge generation device further comprises the following means:

a device for arranging the hash value or the digital signature value according to the geometric shape of the credit identification pattern into a digital pattern, and superimposing on the credit logo graphic pattern, the digital stroke of the digital pattern and the credit identification pattern The overlapping intersections of the texts serve as the trajectories of the lines, forming a random signature of the digital signature credit identifier.

10. The birth of a credit identifier random line according to claim 8 or claim 9. The system is characterized in that the random ridge generating device further comprises the following devices:

a device for recalculating a longer digital signature value using a hash function to obtain a shorter hash value; arranging the set of binary hash values in a digital pattern according to a credit identifier pattern geometry, Above the credit logo graphic pattern, the overlapping portion of the digital stroke digital signature and the credit identification graphic is used as a trajectory to form a digital signature credit identification random ridge.

11. The system for generating a credit identification random ridge according to claim 8 or claim 9, wherein the random ridge generating device further comprises the following means:

a device for calculating a hash value of an electronic file format file or a plain text, and distributing the digital value according to the geometric shape of the credit identification pattern, and superimposing on the credit identification pattern, the digital stroke of the digital pattern and The overlapping portion of the graphic in the credit identification pattern serves as a trajectory to form a credit identification random ridge.

12. The system for generating a credit identification random ridge according to claim 8 or claim 9, wherein the random ridge generating device further comprises the following means:

a device for converting a binary value into a decimal or hexadecimal number, arranged in a digital pattern according to the geometric shape of the credit identification pattern, and superimposed on the credit identification pattern, the digital stroke of the digital pattern The overlapping portion with the graphic in the credit identification pattern serves as a trajectory to form a credit identification random ridge.

13. The system for generating a credit identification random ridge according to claim 8 or claim 9, wherein the random ridge generating device further comprises the following means:

14. The system for generating a credit identification random ridge according to claim 8 or claim 9, wherein the random ridge generation device further comprises the following means: A device, the visual color of the digital stroke in the generated digital signature random ridge pattern, consistent with the background color of the credit identification graphic pattern.

15. The system for generating a credit identification random ridge according to claim 8 or claim 9, wherein the random ridge generation system further comprises the following means:

A method of inspecting a method for generating a credit identification random line according to any one of claims 1 to 7, characterized in that the anti-counterfeiting inspection step is as follows:

Step 1: Digitally scan the document printed on the medium with the credit identification paper; Step 2: Zoom in and view the credit identification image obtained by scanning to see if there is a trajectory, if not, it is regarded as forgery; if there is, continue ;

Step 3: Obtain the hash value of the electronic document or the plain text of the document in the format of the credit identification file, use the digital certificate of the credit identifier signer, and regenerate the generated digital data according to the original credit identifier "random digital line," "random digital line" of this credit mark; and

Step 4: Make this set of "random digital lines" and overlay them on the credit mark to be verified. Observe the coincidence of the track traces. If the line tracks overlap, the credit mark is true.

A system for testing a method for generating a credit identification random line according to any one of the preceding claims 1-7, characterized in that the system comprises the following means:

An input device for digitally scanning a document printed on a medium such as a paper with a credit mark; an identification device for magnifying the image of the credit identification obtained by scanning to see if there is a trajectory of the ridge, and if it is not, it is regarded as forgery; if so, Continue;

a generating device, configured to obtain a hash value of a format electronic file of the credit identification file or a plain text of the file, and encrypt the hash value by using an asymmetric key of the digital certificate of the credit identification unit, according to the credit identifier “random digital line” Generate parameters and rules to regenerate "random number lines" for this credit identifier;

Identification device for making this set of "random digital lines" and superimposed on the need for verification On the credit mark, observe the coincidence of the track traces, and the credit marks are true when the track traces coincide.