Abstract: A scheme of using Cluster quantum entangled state to quantum signature is presented. Cluster state of the program is used as a quantum channel, and each group of quantum bit string signed by Alice is distributed to Alice, notaries TA and inspection signer Bob. The way of loading message is that Alice does transformation operation on the first qubit unitary respectively, and the Bell measurement results of quantum bits are the signature of a message. Bob does the Bell measurement on the corresponding two-qubit to verify the signature, but it must be restricted by the notary TA. It is verified that Cluster state entanglement properties of entangled state, security, local operators have better performance.

Key words: quantum signature, Cluster state, Bell measurement

摘要： 提出一种利用Cluster state纠缠态实现的量子签名方案。该方案中用Cluster态作为量子信道，每一组量子比特串分别分发给消息拥有和签名者Alice、公证人TA、验签名者Bob。加载消息的方法是Alice在TA规定量子比特串序列下，分别对拥有的量子比特对的第一个量子比特进行幺正变换操作而进行。对拥有的量子比特对进行的Bell测量结果是消息的签名。Bob对拥有的对应的两个量子比特对进行Bell测量来验证签名，但要得到公证人TA对其约束才能完成。Cluster state纠缠态在纠缠特性、局域操作保真性和安全性有较好的性能。

关键词: 量子签名, Cluster state, Bell测量