Semi-quantum group signature method and system based on quantum walk

Abstract

The invention belongs to the technical field of quantum communication, and discloses a semi-quantum group signature method and system based on quantum walk, and the method comprises the steps: carrying out the group internal communication through employing a semi-quantum communication mode; using a quantum walking-based mode to carry out communication outside a group, entangled particles being automatically generated in a walking process, and transmitting a communication message by adopting a quantum walking-based invisible transmission state; when the distributed information is signed by group members, performing blind processing on the message by using a certain coding rule, so that the blind information is not acquired by other group members and external potential attackers; and carrying out anti-repudiation, anti-denial, anti-forgery, interception retransmission attack and entanglement attack security analysis on the blind information. According to the method, single-photon-based information transmission is adopted for communication in the group, so that quantum preparation and detection are relatively easy, and the communication cost is greatly saved in the actual applicationprocess.

Description

technical field [0001] The invention belongs to the technical field of quantum communication, and in particular relates to a quantum walk-based semi-quantum group signature method and system. Background technique [0002] Currently, the closest prior art: [0003] Digital signature was originally proposed by Diffie and Hellman in 1976, it plays a very critical role in classical cryptography and many other application scenarios such as data integrity protection, authentication and authorization. However, the security of classical digital signatures depends on some unproven computational complexity assumptions, which are unreliable in the face of quantum computing. [0004] Therefore, quantum digital signatures are proposed, which extend classical digital signatures by adding the theory of quantum mechanics to the original digital signatures. Due to the nature of quantum states, quantum signatures have attracted the interest of many researchers and many quantum signature inv...

AI Technical Summary

Problems solved by technology

[0009] (3) Most quantum signature protocols at this stage lack a detailed analysis of the security of the protocol itself. Many protocols provide simple textual descriptions for the non-repudiation, non-repudiation, and non-forgery of the protocol. Lack of analysis process for some specific attack strategies

[0015] First of all, at the current stage of technology, only single photons can be stably transmitted and analyzed in actual application scenarios, while multi-particle entangled state or cluster state particles themselves are unstable during transmission and difficult to prepare

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