Quantum digital signature method independent of reference system

Abstract

The invention provides a quantum digital signature method independent of a reference system, which is applied to a quantum signature system. The quantum digital signature system comprises three participants of a user side Alice, a Bob and a Charlie, the Alice belongs to a signer, and the Bob and the Charlie belong to signed persons. The method comprises a key distribution stage and a message stage, in the key distribution stage, a key is generated by using a reference system independent quantum key distribution protocol, and then in the message stage, the quantum digital signature is completed by using the key generated in the above process. According to the protocol, a relatively high signature rate can still be kept under the condition that a relatively large deflection angle exists between user reference frames, and the performance of the protocol is superior to that of an existing BB84 quantum digital signature protocol.

Description

technical field

[0001] The invention belongs to the field of quantum digital signature in quantum communication, in particular to a reference frame independent quantum digital signature method. Background technique

[0002] Digital signature is an important cryptographic protocol and is widely used in modern telecommunication, such as distribution of mail and electronic finance. Most of the classic digital signatures, such as RSA, DSA (Digital Signature Algorithm) and ECDSA (Elliptic Curve Digital Signature Algorithm), depend on computational complexity for their security. But unfortunately, with the advent of quantum computing, classical digital signatures are under threat. In the era of quantum computing, secure digital signatures are urgently needed. Compared with classical digital signatures, quantum digital signatures (Quantum DigitalSignature, QDS) are based on quantum mechanics theory, which can ensure the security of communication at the level of information theory...

Images