Homodyne-detector-blinding attack in continuous-variable quantum key distribution
نویسندگان
چکیده
منابع مشابه
A wideband balanced homodyne detector for high speed continuous variable quantum key distribution systems
In Gauissian-modulated coherent-state quantum key distribution, the measurement of quadratures of coherent states is performed by using homodyne detector. However, the existing detectors usually suffer from narrow band. Here we present a method to design a high-speed shot-noise-limited balanced homodyne detector. A 300 MHz bandwidth detector was experimentally tested and the level of shot noise...
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Introduction Quantum key distribution (QKD) [1] enables two remote parties Alice and Bob to share common secure keys which are unknown to a potential eavesdropper. Unconditional security of QKD is based on the fundamental laws of quantum mechanics, but in reality, securities of practical QKD systems could be jeopardized by physical implementations. In discretevariable (DV) QKD system, due to de...
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Security of an ideal system for quantum key distribution can be formally proved. However, technological imperfections of real systems can be misused by an eavesdropper to get information about the key without causing a detectable change in the error rate. An example of this is the blinding attack where the eavesdropper manipulates detectors of the receiving party. To avoid such an attack, techn...
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Most continuous-variable quantum key distribution schemes are based on the Gaussian modulation of coherent states followed by continuous quadrature detection using homodyne detectors. In all previous schemes, the Gaussian modulation has been carried out in conjugate quadratures thus requiring two independent modulators for their implementations. Here, we propose and experimentally test a largel...
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Zhengyu Li, Yichen Zhang, Christian Weedbrook, and Hong Guo1∗ State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, and Center for Quantum Information Technology, Peking University, Beijing 100871, China State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecomm...
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ژورنال
عنوان ژورنال: Physical Review A
سال: 2018
ISSN: 2469-9926,2469-9934
DOI: 10.1103/physreva.98.012312