Quantum digital signature system and method based on Gaussian modulation and homodyne detection

Abstract

The invention discloses a quantum digital signature system and method based on Gaussian modulation and homodyne detection, wherein the technology adopted by the digital signature system is different from the existing quantum digital signature technology, and the digital signature system generates a new hash function every time an abstract is generated; then, the generated abstract is combined with the secret key to perform the XOR encryption operation to obtain the signature, the length of the message is not limited when the abstract is generated, the message with any length can be signed in each round of signature, and the signature efficiency is very high; meanwhile, compared with the existing digital signature technology based on the asymmetric cryptosystem, the method provided by the invention adopts a Gaussian modulation mode to generate a security key, and unconditional security can be ensured while multi-bit messages are signed in one round of signature; furthermore, the digital signature system is based on the homodyne detection technology, so that the digital signature system can be realized by adopting the traditional optical communication technology, no extra instrument is needed, and large-scale deployment on the current optical communication network is facilitated.

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 Gaussian modulation and homodyne detection. Background technique [0002] In today's information age, digital signature is one of the key technologies to ensure information security. It guarantees the integrity of information transmitted in the channel, and also prevents information from being tampered with and prevents the information sender from denying the fact that the information is sent. effect. The current digital signature scheme adopts an asymmetric cryptographic system. The sender uses the private key to encrypt the abstract, and then sends the ciphertext and the message to the receiver; the receiver uses the public key to decrypt the abstract, and uses the same method to reproduce the original text. Create a digest, compare the two digests, and if they are the same, the signature is successful. Asymm...

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: The purpose of the invention is to provide a quantum digital signature system and method based on Gaussian modulation and homodyne detection, which solves the problem that the current general digital signature scheme is based on an asymmetric cryptographic system, which will gradually become invalid with the development of quantum computers problem; while 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; at the same time, it also solves the requirements of existing quantum digital signatures on equipment Harsh, difficult-to-scale-deployment problems

Images