Quantum Blind Signature Scheme with Cluster States Based on Quantum Walk Cryptosystem

摘要

An ingenious quantum blind signature scheme with cluster states based on quantum walk cryptosystem is proposed, in which the keys are generated with quantum walks. Initial phase, signing phase and verification phase are included. In the signing phase, Alice sends the encrypted message to the signer Charlie and requests a quantum blind signature. In the verification phase, the verifier Bob verifies the authenticity and integrity of the message based on the results of the final measurements. The security analysis shows that the security of secret keys and the signature scheme, and it can be neither forged nor disavowed by illegal participants or attackers. Different from previous signature schemes, the original message is encrypted by the quantum walk algorithm, which is firstly applied to the signature scheme. Importantly, it has a wide application in e-commerce or e-payment system.