An efficient and provably secure arbitrated quantum signature scheme

Details An efficient and provably secure arbitrated quantum signature scheme An efficient and provably secure arbitrated quantum signature scheme

2008-06-03

arxiv.org/abs/0806.0557v3

Physics

Quantum Physics

some contents changed, 12 pages

Scientific paper

In this paper, an efficient arbitrated quantum signature scheme is proposed by combining quantum cryptographic techniques and some ideas in classical cryptography. In the presented scheme, the signatory and the receiver can share a long-term secret key with the arbitrator by utilizing the key together with a random number. While in previous quantum signature schemes, the key shared between the signatory and the arbitrator or between the receiver and the arbitrator could be used only once, and thus each time when a signatory needs to sign, the signatory and the receiver have to obtain a new key shared with the arbitrator through a quantum key distribution protocol. Detailed theoretical analysis shows that the proposed scheme is efficient and provably secure.

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