共查询到19条相似文献,搜索用时 93 毫秒
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传统密码学的安全依赖于密钥,密钥的分配是一大难题。尽管公钥密码系统解决了密钥分配问题,但它基本上都基于如大数的分解和离散对数问题等数学难题。一旦计算速度或计算方法有质的飞跃,他们不再安全。而量子密码技术很好的从量子力学原理方面解决了密钥安全传输问题,在加上传统的一次一密系统,则可构建一个不可破的完全保密系统。本文探讨了量子密码技术的原理、协议、应用等问题。 相似文献
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晓晨 《激光与光电子学进展》2006,43(4):75-76
据Optics Letter报道,由郭光灿教授领导的中科院量子信息重点实验室成功地设计了一种具有很高单向传输稳定性的量子密钥分配方案。利用该方案,实现了150km的室内量子密钥分配;经由实际通信光路实现了125km单向量子密钥分配。这是迄今为止国际公开报道的最长距离的实用光纤量子密码系统。 相似文献
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世界各国对量子通信技术的研究十分重视,由于其具有的高效性、安全性、准确性的优势,量子力学在信息传输等方面的应用得到大量利用.我国对量子力学的研究目前也处于高热阶段.本文综述量子密码通讯技术的发展、量子密码通讯的优点以及量子密码通讯技术研究过程中亟待解决的问题,并对其应用前景进行分析. 相似文献
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最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术,具有可证明的安全性,同时还能对窃听者的非法侵入进行检测。本文介绍了有关的量子力学理论,针对主要的量子密钥分发协议BB84进行了说明,产在此基础上提供了具体的试验模型,最后谈论是量子密码技术需要改善的一些问题。 相似文献
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最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术,具有可证明的安全性,同时还能对窃听者的非法侵入进行检测.本文介绍了有关的量子力学理论,针对主要的量子密钥分发协议BB84进行了说明,并在此基础上提供了具体的试验模型,最后谈论了量子密码技术需要改善的一些问题. 相似文献
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量子密码技术被认为是绝对安全的加密技术。近年来,在美国、德国、日本和中国,相关研究都取得了明显进展。2004年6月,世界上第一个量子密码通信网络在美国马萨诸塞州剑桥城正式投入运行,标志着这一技术迈上了新台阶。据相关机构估算,量子保密通信系统一旦商用,将形成高达10亿美元的市场。 相似文献
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Experimental quantum cryptography 总被引:61,自引:0,他引:61
Charles H. Bennett François Bessette Gilles Brassard Louis Salvail John Smolin 《Journal of Cryptology》1992,5(1):3-28
We describe results from an apparatus and protocol designed to implement quantum key distribution, by which two users, who share no secret information initially: (1) exchange a random quantum transmission, consisting of very faint flashes of polarized light; (2) by subsequent public discussion of the sent and received versions of this transmission estimate the extent of eavesdropping that might have taken place on it, and finally (3) if this estimate is small enough, distill from the sent and received versions a smaller body of shared random information, which is certifiably secret in the sense that any third party's expected information on it is an exponentially small fraction of one bit. Because the system depends on the uncertainty principle of quantum physics, instead of the usual mathematical assumptions such as the difficulty of factoring, it remains secure against an adversary with unlimited computing power.This paper was accepted prior to the present Editor-in-Chief taking responsibility. A preliminary version of this paper was presented at Eurocrypt '90, May 21–24, Århus, Denmark, and has appeared in the proceedings, pp. 253–265. François Bessette was supported in part by an NSERC Postgraduate Scholarship. Gilles Brassard was supported in part by Canada's NSERC. This work was performed while John Smolin was visiting IBM Research. 相似文献
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V. L. Kurochkin A. V. Zverev Yu. V. Kurochkin I. I. Ryabtsev I. G. Neizvestny 《Russian Microelectronics》2011,40(4):245-253
A short survey on experimental works in quantum cryptography is presented. We describe experimental setups that were designed
in the Institute of Semiconductor Physics, Siberian Branch of the Russian Academy of Sciences, for quantum key distribution
through an air space and along a fiber-optic communication line. The results of the study of quantum efficiency parameters,
probability of afterpulse appearance, and noise levels for different operation modes of InGaAs-InP avalanche photodiodes are
presented. 相似文献
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