Qubit authentication

Details Qubit authentication Qubit authentication

2001-08-22

arxiv.org/abs/quant-ph/0108100v3

Phys.Rev.A66,022301(2002)

Physics

Quantum Physics

LaTeX, 8 pages

Scientific paper

10.1103/PhysRevA.66.022301

Secure communication requires message authentication. In this paper we address the problem of how to authenticate quantum information sent through a quantum channel between two communicating parties with the minimum amount of resources. Specifically, our objective is to determine whether one elementary quantum message (a qubit) can be authenticated with a key of minimum length. We show that, unlike the case of classical-message quantum authentication, this is not possible.

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