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    secure communication tagged posts

    World’s first quantum microsatellite demonstrates secure communication with multiple ground stations

    March 20, 2025, Categories  Physics, Technology/Electronics

    Schematic diagram of the quantum key distribution experiment between the quantum microsatellite Jinan-1 and ground stations. (Image from USTC)

    A research team has developed the world’s first quantum microsatellite and demonstrated real-time quantum key distribution (QKD) between the satellite and multiple compact, mobile ground stations.

    The research, led by Pan Jianwei, Peng Chengzhi, and Liao Shengkai from USTC, jointly with the Jinan Institute of Quantum Technology, Shanghai Institute of Technical Physics, the Innovation Academy for Microsatellites of the Chinese Academy of Sciences, and Stellenbosch University of South Africa, is published in Nature.

    Quantum secure communication is fundamental to national information security and socioeconomic development...

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    Using Quantum Physics to Secure Wireless Devices

    April 26, 2023, Categories  Physics, Technology/Electronics

    Using quantum physics to secure wireless devices
    Physically unclonable function (PUF) based cryptographic keys generated by the PT-symmetric electronic system. a Illustration of the PUF-enabled secure radio-frequency (RF) authentication and communication. b Generation of the challenge-response pair (CRP) and the cryptographic key in the proposed PUF system. Our experiments utilize the pulse excitation shown in the left panel of b, and the response, represented by the transient voltage signal measured across the reader’s capacitor, and its discretized form are shown in the middle and right panels of b, respectively. After proper sampling and processing, the analog response is converted to a digital key composed of a bitstring. Credit: Nature Communications (2023). DOI: 10.1038/s41467-023-36508-x

    From access cards and key fobs to Blu...

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