Cryptology ePrint Archive: Report 2004/156

Quantum cryptography: a practical information security perspective

Kenneth G. Paterson and Fred Piper and Ruediger Schack

Abstract: Quantum Key Exchange (QKE, also known as Quantum Key Distribution or QKD) allows communicating parties to securely establish cryptographic keys. It is a well-established fact that all QKE protocols require that the parties have access to an authentic channel. Without this authenticated link, QKE is vulnerable to man-in-the-middle attacks. Overlooking this fact results in exaggerated claims and/or false expectations about the potential impact of QKE. In this paper we present a systematic comparison of QKE with traditional key establishment protocols in realistic secure communication systems.

Category / Keywords: applications / quantum cryptography

Publication Info: Also available at quant-ph/0406147

Date: received 6 Jul 2004, last revised 11 Aug 2009

Contact author: kenny paterson at rhul ac uk

Available format(s): PDF | BibTeX Citation

Note: This paper was originally posted with the title "Why quantum cryptography?" It was published in Quantum Communication and Security, Proceedings, NATO Advanced Research Workshop, edited by M. ˙Zukowski, S. Kilin and J. Kowalik, p. 175180 (IOS Press, Amsterdam, 2007).

Version: 20090811:141738 (All versions of this report)

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