Quantum digital signature system and method based on time phase coding

Abstract

The invention discloses a quantum digital signature system and method based on time phase coding, and the quantum digital signature system can have the security in information theory, thereby avoiding the problem that the security cannot be guaranteed along with the development of a quantum computing technology. The method comprises the following steps: generating a secure key in a signature process, after the key is generated, selecting a random number obtained in a random number generator to generate an irreducible polynomial, generating a hash function by the irreducible polynomial and part of the key, and inputting a message into the hash function to generate a hash value, where the Hash function used each time needs to be updated, and the remaining secret key for generating the Hash function is used for encryption; converting messages with any length into fixed-length hash values by means of the generated hash function. According to the invention, the digital signature involved in the method has no limitation on the length of the messages, and the signature efficiency is very high.

Description

technical field [0001] The invention relates to the field of quantum communication security, in particular to a quantum digital signature system and method based on time phase encoding. Background technique [0002] In order to cope with the threat of quantum computing technology to information security technology designed based on computational complexity and to better process information in the future quantum information age, research in the field of quantum cryptography and even quantum information security has emerged as the times require, which is different from computing based on mathematical problems. Complex asymmetric cryptographic system, quantum information security technology aims to provide information with security based on the laws of physics, because its security is based on the basic principle of quantum unclonability in quantum mechanics and the properties of entanglement in quantum mechanics, so Regardless of the development of computing technology, even c...

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Problems solved by technology

[0006] Purpose of the invention: The purpose of the invention is to provide a quantum digital signature system and method based on time-phase encoding, which solves the problem that the widely used digital signature technology is based on an asymmetric cryptographic system, which will gradually become impossible with the development of quantum computing technology. The problem of ensuring security; and the efficiency of existing quantum digital signatures is very low, each round of signatures can only sign one bit of data, and generating signatures consumes a lot of communication resources

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