Anti-collusion quantum key negotiation method, computer terminal and storage device

Abstract

The invention provides an anti-collusion quantum key negotiation method, a computer terminal and a storage device. The method comprises a third-party interaction terminal TP and N negotiation interaction terminals Pi. The method comprises: preparing N message sequences {S0,and the like, SN-1} by a TP, each message sequence Si comprising m ordered quantum bits, and the TP correspondingly sending each Si to the corresponding Pi; encoding own secret information Ki into a message sequence Si by the N negotiation interaction ends according to an encoding rule, randomly generating m quantum decoy states by the Pi, randomly inserting the m quantum decoy states into the encoded message sequence to obtain a new sequence Pi, and sending the new sequence Pi to the Pi + 1; performing eavesdropping detection until the Nth round of circulation is completed, sending quantum base information of each quantum bit in the Si to Pi-1 by TP, measuring the message sequence Si under a corresponding base by Pi-1, and calculating a final negotiation key. The method can prevent an internal colluder from acquiring key exclusive OR information of other legal negotiation interaction terminals in a key stealingstage, and further controls a final shared key in a key overturning stage.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a collusion-resistant quantum key agreement method. Background technique [0002] Quantum Key Agreement (Quantum Key Agreement, QKA) is to use the theory of quantum mechanics to achieve key agreement tasks. As an emerging research field of quantum cryptography, quantum key agreement solves the key sharing problem of group organization activities in the network. [0003] Under different security definitions, QKA can be divided into two categories. One is the QKA protocol under the weak security definition, where two or more parties negotiate a key through an open channel. Under this weak security definition, the QKA protocol is the well-known Quantum Key Distribution (Quantum Key Distribution, QKD) protocol. Under the definition of strong security, QKA not only requires all users to participate in the key generation process through an open channel, but also must ge...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a collusion-resistant quantum key agreement method, which aims to solve the problem that the existing quantum key distribution protocol cannot resist external attackers and internal attacks by dishonest participants