Quantum authentication with unitary coding sets

Details Quantum authentication with unitary coding sets Quantum authentication with unitary coding sets

2002-09-09

arxiv.org/abs/quant-ph/0209061v1

Journal of Modern Optics 50(6-7), 1035-1047 (2003)

Physics

Quantum Physics

RevTeX4, 10 pages

Scientific paper

A general class of authentication schemes for arbitrary quantum messages is proposed. The class is based on the use of sets of unitary quantum operations in both transmission and reception, and on appending a quantum tag to the quantum message used in transmission. The previous secret between partners required for any authentication is a classical key. We obtain the minimal requirements on the unitary operations that lead to a probability of failure of the scheme less than one. This failure may be caused by someone performing a unitary operation on the message in the channel between the communicating partners, or by a potential forger impersonating the transmitter.

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