A Quantum Proxy Arbitrated Signature Scheme Based on Two Three-Qubit GHZ States

摘要

In this paper, we proposed a quantum proxy arbitrated signature scheme based on two three-qubit GHZ states. In the scheme, we chose a trust third party (TP) as proxy signer, which can finish the signature process without the original signer's authority. The scheme uses the physical characteristics of quantum mechanics to implement delegation, signature and verification. It could guarantee not only the unconditionally security but also the anonymity of the message owner. We prove that our scheme can resist the eavesdropping attack, and the security analysis shows the scheme satisfies the security features of proxy arbitrated signature, singers cannot disavowal his signature while the signature cannot be forged by others, and the message owner can also be traced.