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Quantum blind signature with an offline repository

Souto, A. ; Ribeiro, J. ; Mateus, P.

International Journal of Quantum Information Vol. 13, Nº 2, pp. 1550016-1 - 1550016-21, April, 2015.

ISSN (print): 0219-7499
ISSN (online):

Journal Impact Factor: 0,877 (in 2014)

Digital Object Identifier: 10.1142/S0219749915500161

We propose a quantum blind signature scheme that achieves perfect security under the assumption
of an honest o®line repository. The security of the protocol also relies on perfect
private quantum channels, which are achievable using quantum one-time pads with keys shared
via a quantum key distribution (QKD) protocol. The proposed approach ensures that signatures
cannot be copied and that the sender must compromise to a single message, which are important
advantages over classical protocols for certain applications.