Quantum blind signature message authenticity protection method

Abstract

The invention discloses a quantum blind signature message authenticity protection method which sequentially includes a preparation stage, a message blinding stage, a blind signature stage, a receiving verification stage and an arbitration stage. A customer respectively shares a key with other customers and sellers by the aid of a quantum key distribution protocol and applies for signature from a bank after encrypting and blinding messages by the key, the messages are transmitted to the sellers after blind signature of the bank, and the sellers accept valid blind signature after verification. When the customer and the sellers are in dispute, the bank is introduced as a trustworthy arbitrator for arbitration, judges the condition of even bits according to the key and then compares odd bits, and the signature is regarded as invalid signature if one bit does not conform to rules. When the signature of application messages or blind messages is modified, the signature can be verified, and blind signature message authenticity is ensured.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a method for protecting message authenticity in quantum blind signing. Background technique [0002] Digital signature technology is mainly used to protect the authenticity, integrity and non-repudiation of messages. Blind signatures are a variation of digital signatures in which the signer cannot see the content of the signed message when signing the message. Blind signatures are carried out among the signer, verifier and arbitrator, and play an important role in electronic voting, electronic payment systems and other fields. However, the security of traditional blind signature technology solutions is generally based on certain mathematical problems, such as large number decomposition problems and discrete logarithm problems. With the continuous improvement of computer computing speed and the introduction of various advanced algorithms, especially quantum computers...

AI Technical Summary

Problems solved by technology

[0003] Although these blind signature technologies hide the signature message from the signer, and can resist some integrity and non-repudiation attacks, however, there is a common security problem in the existing quantum blind signature technology: the verifier does not need the communication key , only using the existing signature to successfully forge a valid signature, which poses a threat to the authenticity of the blind signature

[0005] Therefore, the authenticity of blindly signed messages cannot be effectively protected

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