Quantum asymmetric cryptography with symmetric keys

Details Quantum asymmetric cryptography with symmetric keys Quantum asymmetric cryptography with symmetric keys

2008-10-16

arxiv.org/abs/0810.2859v1

Sci. China Ser. G, 2009, 52(12): 1925-1931

Physics

Quantum Physics

8 pages, 1 figure, Revtex4

Scientific paper

10.1007/s11433-009-0299-3

Based on quantum encryption, we present a new idea for quantum public-key cryptography (QPKC) and construct a whole theoretical framework of a QPKC system. We show that the quantum-mechanical nature renders it feasible and reasonable to use symmetric keys in such a scheme, which is quite different from that in conventional public-key cryptography. The security of our scheme is analyzed and some features are discussed. Furthermore, the state-estimation attack to a prior QPKC scheme is demonstrated.

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