Verification method of electronic seal pattern and verification method of file containing electronic seal

Abstract

The invention discloses a verification method of an electronic seal pattern and a verification method of a file containing an electronic seal. A time parameter of the moment when the seal signs is converted into data and taken as a variable, the data and pixel data of the seal pattern of seal hardware perform combination operation, and data obtained after the combination operation are subjected to operation of a hash function, so that a hardware seal verification code is obtained; the hardware seal verification code and the time parameter of the moment when the seal signs are stored, encrypted and transmitted to a verification network by a computer; the verification network receives and decodes the hardware seal verification code and the time parameter of the moment when the seal signs, the time parameter of the moment when the seal signs is converted into data and taken as a variable, the data and pixel data of the seal pattern of the verification network are subjected to combination operation, and data obtained after the combination operation are subjected to operation of the hash function, so that a network seal verification code is obtained; and consistency of the hardware seal verification code and the network seal verification code is compared, so that the primitiveness of the seal pattern is verified, and seal verification information is generated.

Description

【Technical field】 [0001] The invention belongs to the technical field of anti-counterfeiting of electronic information technology, and relates to the information security application technology of signing electronic documents with electronic seals for electronic government affairs and electronic commerce. 【technical background】 [0002] The problem of traditional engraved seals is that the traditional seal imitated by electronic scanning technology and modern machine-controlled engraving technology imprinted on paper documents has been unable to use simple technology to identify its authenticity, resulting in fake documents and certificates , The proliferation of fake bills. [0003] Traditional engraved seals cannot sign electronic documents, and electronic documents that often need to be published on the Internet in electronic form are to convert signed paper documents into "electronic version" format through scanning or photographic technology. This "electronic version" ...

AI Technical Summary

Problems solved by technology

[0002] The problem of traditional engraved seals is that the traditional seal imitated by electronic scanning technology and modern machine-controlled engraving technology imprinted on paper documents has been unable to use simple technology to identify its authenticity, resulting in fake documents and certificates , the proliferation of fake bills

[0013] Problem 1: Cannot sign plaintext

For those clear text documents that do not need or cannot be encrypted by digital signature technology but need to be stamped, such as broadcast electronic documents such as plain text, notices, announcements, etc., they do not need to be encrypted but need to be signed, and the above-mentioned software seal Similarly, if you sign an electronic seal on such a document without encrypting it into ciphertext with a digital signature, there is no way to guarantee data security, and you cannot use a digital signature verification method to verify the authenticity of the seal, so you cannot Possibility to ensure that the seal image will not be copied and used maliciously

[0015] Existing problem 2. Evidence verification problem

[0016] The combination of time parameter and random function is the use evidence of the seal, which is stored in the internal memory of the seal for anti-counterfeiting and anti-repudiation queries, but "the signature time and random function encrypted password function database in the seal must be read through the seal supervision department." , it can be seen that the authority and technical measures to verify the seal use evidence stored in the database have not been popularized to all personnel, which greatly limits the versatility of the seal system

In addition, this verification evidence verification method, like the above-mentioned problem 2, will also bring additional and cumbersome work to seal users and seal supervision departments

[0017] Problem 3. The preservation measures for seal use evidence are simple

The existing problems are: the evidence preservation method is single and there is no backup, the loss of the seal hardware or the failure of components in the hardware may lead to the possibility of evidence loss

[0019] Problem 4. The set dynamic real-time clock needs a built-in power supply

[0020] The dynamic time parameters must provide the power supply for the real-time clock chip to keep the chip running dynamically. To replace the power supply, the hardware shell must be opened. Opening the seal shell has the problem that the internal parameters can be modified; if the power supply is packaged outside the seal hardware, it is convenient to replace, but There are objective or artificial results of time parameter interruption, failure or error caused by power failure; in addition, the real-time clock chip is used to provide dynamic time parameters, and the components in the real-time clock chip circuit are affected by power supply, temperature, humidity and various physical parameters Changes lead to cumulative errors in the time parameters provided by the circuit. When the cumulative errors are too large, the time parameters lose their reference value, so there is a problem of regular time calibration

The scheme of this patent is to leave the problem of opening the hardware shell to replace the power supply and the work of regular time adjustment to the seal supervision department. Although this method solves the existing problems, it brings additional costs to the seal user and the seal supervision department. tedious work

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