Abstract
Public-key cryptosystems for quantum messages are considered from two aspects: public-key encryption and public-key authentication. Firstly, we propose a general construction of quantum public-key encryption scheme, and then construct an information-theoretic secure instance. Then, we propose a quantum public-key authentication scheme, which can protect the integrity of quantum messages. This scheme can both encrypt and authenticate quantum messages. It is information-theoretic secure with regard to encryption, and the success probability of tampering decreases exponentially with the security parameter with regard to authentication. Compared with classical public-key cryptosystems, one private-key in our schemes corresponds to an exponential number of public-keys, and every quantum public-key used by the sender is an unknown quantum state to the sender.
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Liang, M., Yang, L. Public-key encryption and authentication of quantum information. Sci. China Phys. Mech. Astron. 55, 1618–1629 (2012). https://doi.org/10.1007/s11433-011-4806-y
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DOI: https://doi.org/10.1007/s11433-011-4806-y