Multi-party quantum key negotiation method, computer terminal and storage device

Abstract

The invention provides a multi-party quantum key negotiation method, a computer terminal and a storage device, the multi-party quantum key negotiation method comprises N negotiation interaction terminals which are respectively marked as Pi, and each Pi respectively prepares an information coding state and an eavesdrop detection state; the information coding state is randomly inserted into the eavesdropping detection state to obtain a new quantum state sequence, wherein each Pi sends the obtained information to Pi + 1; and Pi + 1 and Pi are subjected to channel security detection, a first roundof circulation is completed, if the channel security is judged, a next round of circulation is performed until N rounds of circulation are completed, and finally, all negotiation interaction ends randomly publish respective randomly selected values, and secret negotiation keys of the N interaction ends are calculated based on the property of unitary operation. The protocol can be realized in a single quantum system, the key generation efficiency is improved by using a super-secret coding technology, higher security than classical key negotiation can be provided based on a quantum mechanics theory, the fairness of participants can be effectively protected, and malicious users are prevented from controlling the generation of keys.

Description

technical field [0001] The invention belongs to the technical field of quantum cryptography, and in particular relates to a multi-party quantum key agreement method. Background technique [0002] Key agreement (key agreement, KA) is one of the most basic and core topics in modern cryptography, and it is the key to establishing a cryptosystem mechanism. Key agreement has always been a research hotspot in cryptography. Its purpose is to enable two or more parties to securely negotiate a shared session key that will be used for secure communication or secure computation in a cryptographic system. Therefore, the security strength of a cryptographic system largely depends on the security of key agreement. [0003] The classic key agreement scheme needs a special server to store the password of the participant, as a result, the attacker can obtain the password saved by the participant through the server. [0004] Therefore, there are great security risks in classical key agreem...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multi-party quantum key agreement method, which aims to solve the problem that there is a great security risk in classical key agreement

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