摘要:
提出了基于单光子的单向量子安全通信方案.发送方在对信息序列进行编码操作之前首先将其和随机序列进行异或操作并插入校验序列.接收方收到光子后对其进行延迟,此后发送方公布编码基从而使接收方在正确的基下进行测量.接着双方通过校验序列判断信道的安全性,如果信道安全,则发送方公布接收方有测量结果的位置所对应的随机序列,接收方由此恢复出信息序列;如果信道不安全,窃听者所获得的只是随机的发送序列,信息序列仍然是安全的.此协议与双向通信协议相比具有传输效率高、易于实现等优点.
Abstract:
One-way deterministic secure quantum communication protocol based on single photons is proposed in this paper,in which the XOR operation by bits of the information sequence and random sequence is performed and the checking sequence is inserted before the sender's coding operation.When the photons arrive at the receiver,they are delayed at the receiver,and the sender then publishes the coding basis,so the photons can be measured in the correct basis.Then the two parties estimate the security of the quantum channel by the checking bits.When the channel is secure the sender publishes the random bits where the receiver has results,and the information sequence can be recovered by the receiver.Even the channel is not secure,what the eavesdropper gets is the random sending sequence,the information sequence is still secure.This protocol has the advantages of higher transmission efficiency and easier implementation compared with the two-way communication.
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