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量子密码系统技术实现与实用化研究进展 总被引:3,自引:0,他引:3
本文详细介绍了量子密码的技术研究进展以及量子密码的实用化研究状况。首先简单描述了量子密码的定义,并归纳了量子密码的基本思想。然后,详细介绍了量子密码和量子保密通信的国内外研究进展,包括理论研究进展、技术研究进展、在原型系统与产品的研制方面的进展、在与现有网络的融合性应用方面进展等方面的内容。最后,对量子密码的技术进展与应用做了简单介绍与展望。 相似文献
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2004年,NGN系统得到了大规模的商用。传统的电路交换网正日益被以VoIP为核心技术的NGN所取代。但是,目前的NGN接入网关设备主要提供传统的POTS功能,而无法提供ISDN业务,这就给NGN设备在组网上带来很大的麻烦。因为在现有的交换机和基于V5接口的接入网设备上提供了大量的ISDN用户,很多商业用户和PBX还在使用ISDN接口,而且这种局面在将来相当长的时间内还将持续下去。因此,在NGN组网中,全面支持ISDN业务是必不可少的。NGN实现ISDN的原理在NGN系统中支持ISDN业务的网络协议拓扑结构如图1所示。在图中,EP为标准的ISDN… 相似文献
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A polarization diversity receiver scheme is presented for improving efficiency of balance homodyne detection. The proposed scheme may mitigate polarization fluctuation between signal and local oscillator field. With simple linear optical component and electronic processing circuit, the noise caused by differential phase and polarization mode between signed and local oscillators may be significantly decreased. To track the polarization fluctuation, a novel algorithm based on polarization diversity receiver which can achieve better performance in terms of linear quantum optics principle is proposed. 相似文献
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In this paper security of the quantum key distribution scheme using
correlations of continuous variable Einstein--Podolsky--Rosen (EPR)
pairs is investigated. A new approach for calculating the secret
information rate Δ I is proposed by using the Shannon
information theory. Employing an available parameter F which is
associated with the entanglement of the EPR pairs, one can detect
easily the eavesdropping. Results show that the proposed scheme is
secure against individual beam splitter attack strategy with a
proper squeeze parameter. 相似文献
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