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Special Properties of Strongly Universal2 Hash Functions Important in Quantum Cryptography
Linköpings universitet, Matematiska institutionen, Tillämpad matematik. Linköpings universitet, Tekniska högskolan.
Linköpings universitet, Matematiska institutionen, Tillämpad matematik. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0002-1082-8325
2009 (Engelska)Ingår i: AIP Conference Proceedings, ISSN 0094-243X, Foundations of Probability and Physics—5, Växjö, augusti 2008, New York: American Institute of Physics , 2009, Vol. 1101, s. 289-293Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Secure message authentication is an important part of Quantum Key Distribution. In this paper we analyze special properties of a Strongly Universal2 hash function family, an understanding of which is important in the security analysis of the authentication used in Quantum Cryptography. We answer the following question: How much of Alices message does Eve need to influence so that the message along with its tag will give her enough information to create the correct tag for her message?

Ort, förlag, år, upplaga, sidor
New York: American Institute of Physics , 2009. Vol. 1101, s. 289-293
Nyckelord [en]
Quantum cryptography, Quantum theory, Probability
Nationell ämneskategori
Matematik
Identifikatorer
URN: urn:nbn:se:liu:diva-18738DOI: 10.1063/1.3109951OAI: oai:DiVA.org:liu-18738DiVA, id: diva2:221270
Konferens
Foundations of Probability and Physics—5, Växjö, augusti 2008
Projekt
ICG QCTillgänglig från: 2009-06-03 Skapad: 2009-06-03 Senast uppdaterad: 2016-08-31
Ingår i avhandling
1. Weaknesses of Authentication in Quantum Cryptography and Strongly Universal Hash Functions
Öppna denna publikation i ny flik eller fönster >>Weaknesses of Authentication in Quantum Cryptography and Strongly Universal Hash Functions
2010 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Authentication is an indispensable part of Quantum Cryptography, which is an unconditionally secure key distribution technique based on the laws of nature. Without proper authentication, Quantum Cryptography is vulnerable to “man-in-the-middle” attacks. Therefore, to guarantee unconditional security of any Quantum Cryptographic protocols, the authentication used must also be unconditionally secure. The standard in Quantum Cryptography is to use theWegman-Carter authentication, which is unconditionally secure and is based on the idea of universal hashing.

In this thesis, we first investigate properties of a Strongly Universal hash function family to facilitate understanding the properties of (classical) authentication used in Quantum Cryptography. Then, we study vulnerabilities of a recently proposed authentication protocol intended to rule out a "man-in-the-middle" attack on Quantum Cryptography. Here, we point out that the proposed authentication primitive is not secure when used in a generic Quantum Cryptographic protocol. Lastly, we estimate the lifetime of authentication using encrypted tags when the encryption key is partially known. Under simplifying assumptions, we derive that the lifetime is linearly dependent on the length of the authentication key. Experimental results that support the theoretical results are also presented.

Ort, förlag, år, upplaga, sidor
Linköping: Linköping University Electronic Press, 2010. s. 37
Serie
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1447
Nationell ämneskategori
Matematik
Identifikatorer
urn:nbn:se:liu:diva-57290 (URN)978-91-7393-354-4 (ISBN)
Handledare
Projekt
ICG QC
Tillgänglig från: 2010-06-16 Skapad: 2010-06-16 Senast uppdaterad: 2016-08-31Bibliografiskt granskad

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Abidin, AysajanLarsson, Jan-Åke

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