Security-Mediated Certificateless Cryptography

Chow, Sherman, Boyd, Colin A., & Gonzalez Nieto, Juan M. (2006) Security-Mediated Certificateless Cryptography. Public Key Cryptology- PKC 2006 (LNCS), 3958, pp. 508-524.

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We introduce the notion of security-mediated certificateless (SMC) cryptography. This allows more lightweight versions of mediated cryptography while maintaining the ability for instantaneous revocation of keys. Moreover, our solutions avoid key escrow, which has been used in all previous mediated cryptography algorithms. We provide a model of security against a fully-adaptive chosen ciphertext attacker, who may be a rogue key generation centre or any coalition of rogue users. We present a generic construction and also a concrete algorithm based on bilinear pairings. Our concrete scheme is more efficient than the identity-based mediated encryption scheme of Baek and Zheng in PKC 2004 which is provably secure in a comparable security model. In addition, our proposals can be easily extended to support distributed security mediators.

Impact and interest:

23 citations in Scopus
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34 citations in Web of Science®

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389 since deposited on 23 Nov 2007
152 in the past twelve months

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ID Code: 10890
Item Type: Journal Article
Refereed: Yes
DOI: 10.1007/11745853_33
ISBN: 3540338519
ISSN: 0302-9743 (Print) 1611-3349 (Online)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 2006 Springer-Verlag
Deposited On: 23 Nov 2007 00:00
Last Modified: 01 Mar 2012 03:15

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