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Security of Entanglement Swapping QKD Protocols against Collective Attacks

Authors:
Stefan Schauer
Martin Suda

Keywords: quantum key distribution; entanglement swapping; security analysis; optimal basis transformations

Abstract:
We discuss the security of quantum key distribution protocols based on entanglement swapping against collective attacks. Therefore, we apply a generic version of a collective attack strategy on the most general entanglement swapping scenario used for key distribution. Further, we focus on basis transformations, which are the most common operations performed by the legitimate parties to secure the communication. In this context, we show that the angles, which describe these basis transformations can be optimized compared to an application of the Hadamard operation. As a main result, we show that the adversary's information is reduced to a new minimum of about 0.45, which is about 10% lower than in other protocols.

Pages: 60 to 64

Copyright: Copyright (c) IARIA, 2012

Publication date: August 19, 2012

Published in: conference

ISSN: 2308-3530

ISBN: 978-1-61208-214-1

Location: Rome, Italy

Dates: from August 19, 2012 to August 24, 2012