Quantum authentication of classical messages

Details Quantum authentication of classical messages Quantum authentication of classical messages

2001-03-21

arxiv.org/abs/quant-ph/0103122v2

Phys.Rev.A64,062309(2001)

Physics

Quantum Physics

LaTeX, 6 pages

Scientific paper

10.1103/PhysRevA.64.062309

Although key distribution is arguably the most studied context on which to apply quantum cryptographic techniques, message authentication, i.e., certifying the identity of the message originator and the integrity of the message sent, can also benefit from the use of quantum resources. Classically, message authentication can be performed by techniques based on hash functions. However, the security of the resulting protocols depends on the selection of appropriate hash functions, and on the use of long authentication keys. In this paper we propose a quantum authentication procedure that, making use of just one qubit as the authentication key, allows the authentication of binary classical messages in a secure manner.

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