A 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 walking, which adopts a semi-quantum communication mode for group internal communication; adopts a quantum walking-based method for group external communication, so that The entangled particles are automatically generated during the walking process, and the communication messages are transmitted by teleportation based on quantum walking; when the distributed information is signed by the group members, certain coding rules are used to blind the messages, so that The blinded information cannot be obtained by other group members and external potential attackers; and the security analysis of anti-repudiation, anti-repudiation, anti-forgery, interception and retransmission attacks and entanglement attacks is carried out on the blinded information. In the present invention, the communication in the group adopts information transmission based on single photons, which makes the preparation and detection of quantum relatively easy, and greatly saves communication cost in the actual application process.

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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