Quantum blind signature method and system based on Bell state entanglement exchange

Abstract

The invention belongs to the technical field of network information processing, and discloses a quantum blind signature method and system based on Bell state entanglement exchange. A quantum blind signature protocol is provided based on a Bell state entanglement transformation relation, and a message owner executes a Bell state entanglement exchange on a particle sequence to complete conversion from a classical message to a quantum message. The absolute security of the protocol is ensured by the three participants through the quantum keys which are respectively shared. Through analysis of thetechnical scheme, the protocol meets blind signature definition, blind signature of n-bit messages can be completed through efficiency analysis, and the particle efficiency of the protocol is 14.3%. Astrict security analysis process proves that the protocol can realize a blind signature function, and the whole signature process can be completed with relatively good particle efficiency; accordingto the invention, Bell-state particles are selected as an information carrier, so that the complex preparation cost of three or more particle states is avoided.

Description

technical field [0001] The invention belongs to the technical field of network information processing, and in particular relates to a quantum blind signature method and system based on Bell state entanglement exchange. Background technique [0002] Currently, the closest prior art: [0003] In 1984, Bennett and Brassard proposed the first quantum cryptography protocol, the BB84 protocol [1], and researchers have worked on a large number of quantum cryptography protocols and quantum communication protocols, including the quantum key distribution protocol (QKD) [2-4] , Quantum Direct Secure Communication Protocol (QSDC), Quantum Secret Sharing Protocol (QSS), Quantum Privacy Query Protocol (QPQ), etc. [0004] The concept of electronic signature was first proposed by Diffie and Hellman in 1976. In 1983, Chaum et al. proposed the concept of blind signature based on electronic signature. The basic requirements of the blind signature protocol are: (1) Unforgeability, no one can...

AI Technical Summary

Problems solved by technology

The basic requirements of the blind signature protocol are: (1) Unforgeability, no one can forge the signature except the signer

(2) Non-repudiation, neither the message owner nor the signer can deny their operation on the message

(3) Blindness, the signer cannot match his signature with the message

[0015] How to solve the problem of low particle usage efficiency and transmission efficiency

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