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arXiv · 1205.2246

Quantum public-key algorithms to encrypt and authenticate quantum messages with information-theoretic security

Min Liang·Li Yang
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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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Min Liang, Li Yang. 2012-05-10. Quantum public-key algorithms to encrypt and authenticate quantum messages with information-theoretic security. https://arxiv.org/abs/1205.2246

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