Improvement of One Quantum Encryption Scheme

摘要：

Based on quantum computation, Zhou et al pro posed a quantum encryption scheme in 2006. Each qubit of the ciphertext is constrained to two pairs of conjugate states. So its implementation is feasible with the existing technology. But it is inefficient since it entails six key bits to encrypt one message bit, and the resulting ciphertext for one message bit consists of three qubits. In addition, its security can not be directly reduced to the well-known BB84 protocol. In this paper, we revisit it using the technique developed in BB84 protocol. The new scheme entails only two key bits to encrypt one message bit The resulting ciphertext is just composed of two qubits. It saves about a half cost without the loss of security. Moreover, the encryption scheme is probabilistic other than deterministic.

关键词： conjugate states Hadamard gate

作者: Zhengjun Cao Lihua Liu

作者单位: Department of Mathematics,Shanghai University Department of Mathematics,Shanghai Maritime University, China

会议类型: 国际会议

会议名称: 2010 IEEE International Conference on Intelligent Computing and Intelligent Systems(2010 IEEE 智能计算与智能系统国际会议 ICIS 2010)

会议地点: 厦门

会议语种:英文

页码: 335-339

在线出版日期: 2010-10-29（万方平台首次上网日期，不代表论文的发表时间）