Blind signature generation method and system based on SM9 digital signature

Abstract

The invention discloses a blind signature generation method and system based on SM9 digital signature. The method comprises the following steps: 1) a key generation center KGC generates a signature private key DSA of a Signer; 2) the Signer calculates a first temporary variable w and sends the w to a User; 3) after the User receives the w, a second temporary variable w' and a hash value h) of a to-be-signed message M are generated, and a third temporary variable h' is calculated and sent to the Signer finally; 4) after the Signer receives the h', the temporary signature S' is calculated and sent to the User; 5) the User receives the S' and then calculates a signature value S, and outputs the signature (h, S). The method has the characteristics of low complexity, high security, easy verification, etc. The signature generation process must have both Signer and User participating simultaneously, and the process of generating the SM9 blind signature does not leak the signed message to thesigner, thus ensuring the security of the message, and improving the fairness of the SM9 digital signature generation.

Description

technical field [0001] The invention relates to information security technology, in particular to a blind signature generation method and system based on SM9 digital signature. Background technique [0002] Digital signature is a kind of security protection technology that emerges with the development of information network technology. Its purpose is to realize the function of traditional paper signature or seal through technical means, and it is used to identify the identity of the signatory and verify the content of an electronic data. recognition. It can also verify whether the original text of the document has changed during the transmission process, ensuring the integrity, authenticity and non-repudiation of the transmitted electronic document. Digital signature is an important part of public key cryptography and plays an important role in many occasions. [0003] In many occasions, when the signer is required to sign the message, he does not know the content of the s...

AI Technical Summary

Problems solved by technology

Blind signature can just meet this requirement. Its advantage is that it can protect the privacy of users better than general digital signatures, because the message provided by the user during the signing process is completely unknown to the signer, and the signature I will not be able to trace my signature in the future

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