Quantum identity authentication method and system based on continuous variable quantum key distribution

Abstract

The invention provides a quantum identity authentication method and system based on continuous variable quantum key distribution. The method comprises the steps that a user side and an authentication center share an authentication key Ks through the continuous variable quantum key distribution system; obtaining a bit string Ka of first N binary bits in the authentication key Ks; the user side calculates a binary bit string KID by using an authentication base Kb composed of a binary bit string Ka and a binary bit string with the length of N, and then sends the KID to the authentication center through a channel; the authentication center obtains a binary bit string K'a with the length of N based on the authentication key K's after channel sharing, and the authentication center calculates a binary bit string K 'ID by using an authentication base K'b formed by the binary bit string K'a and the shared binary bit string with the length of N; calculating the correlation of the KID and the K 'ID respectively calculated by the user side and the authentication center, and judging whether the user side is a legal user or not; and after the authentication succeeds, taking a binary bit string which is not used from N + 1 in the authentication key Ks and has the length of N as a binary identity authentication base of the next stage.

Description

technical field [0001] The invention relates to a communication identity authentication method, in particular to a quantum identity authentication method and system based on continuous variable quantum key distribution. Background technique [0002] The continuous development of communication technology has made the communication of human society break through the limitation of time and region, greatly accelerated the efficiency of information transmission, and facilitated our life. However, while enjoying the convenience brought by the communication system, people are also more worried about the security of communication. In this era when information is a resource, the confidentiality of information is particularly important. Most of the current methods of encrypting information are basically based on the complexity of computing, but with the rapid improvement of people's computing power, especially the emergence of quantum computing theory, the security of traditional encr...

AI Technical Summary

Problems solved by technology

However, most of the existing identity authentication schemes are proposed based on discrete variable technology, and the current research is mostly focused on quantum key distribution, and there is little research on continuous variable quantum identity authentication.

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