量子保密通信的理想与现实

Theory and Practice of Quantum Secure Communication

目前,国内外都在进行量子保密通信技术特别是量子密钥协商(Quantum Key Distribution,QKD)技术的应用研究,并取得了许多重要成果。QKD具有理想的物理安全性,但实际上QKD系统很难达到理想的状态。QKD系统的实际安全性如何测评,自由空间QKD网络是否能够解决信息战环境下的保密通信问题,QKD能否完全解决量子计算环境下的信息安全问题等,对这些与实际应用密切相关的问题进行深入探讨具有十分重要的实际意义。

Recently, many important results on quantum secure communication, especially on quantum key distribution（QKD）, have been achieved. QKD, being physically secure in theory, however, is not so easy in realizing an ideal QKD system. How to evaluate the security of QKD system in practice？ Can free space QKD network provide secure communication under information war？ Can QKD protect information security against quantum computer attack？ Studies on all these problems both in theory and practice undoubtedly play an important role in practice.