Continuous variable quantum signature algorithm
Continuous variable quantum signature algorithm
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DOI：
10.1142/s0219749907003031
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发表时间：
2007-08-01
影响因子：
1.2
通讯作者：
He, Guangqiang
中科院分区：
文献类型：
--
作者：
Zeng, Guihua;Lee, Moonho;He, Guangqiang
提出了一种基于连续变纠缠态的真量子签名算法。在建议的算法中，基于单向函数生成一个密钥对，即私有签名密钥和公共验证密钥。利用签名密钥，将消息状态编码为2k粒子纠缠态，制备出双粒子纠缠态。结果状态被用作消息状态的签名。签名需要验证时，可以在验证密钥下进行解码。随后，得到解码后的信息状态和双粒子纠缠态。为了比较解码状态和原始状态，利用量子电路来比较这些状态。利用量子电路的测量结果可以判断接收签名的真实性。根据签名方案的安全性要求，利用香农信息理论证明了所提算法的理论上安全性。
A true quantum signature algorithm based on continuous-variable entanglement state is proposed. In the suggested algorithm, a key-pair, i.e. private signature key and public verification key, is generated based on a one-way function. By employing the signature key, a message state is encoded into a 2k-particle entangled state and a two-particle entangled state is prepared. The resulting states are exploited as a signature of the message state. The signature can be decoded under the verification key when it needs to be verified. Subsequently, a decoded message state and a two-particle entangled state are obtained. To compare the decoded states and the original states, a quantum circuit for comparing these states is exploited. Making use of measurement results of the quantum circuit one can judge the authenticity of the received signature. According to the security requirement of the signature scheme, the suggested algorithm has been proven to be theoretically secure by using the Shannon information theory.