Efficient chosen-ciphertext secure identity-based encryption with wildcards

Authors:
James Birkett;Alexander W. Dent;Gregory Neven;Jacob C. N. Schuldt
Affiliations:
Royal Holloway, University of London, Egham, UK;Royal Holloway, University of London, Egham, UK;Department of Electrical Engineering, Katholieke Universiteit Leuven, Heverlee, Belgium;Royal Holloway, University of London, Egham, UK and Institute of Industrial Science, University of Tokyo, Tokyo, Japan
Venue:
ACISP'07 Proceedings of the 12th Australasian conference on Information security and privacy
Year:
2007

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Abstract

We propose new instantiations of chosen-ciphertext secure of identity-based encryption schemes with wildcards (WIBE). Our schemes outperform all existing alternatives in terms of efficiency as well as security. We achieve these results by extending the hybrid encryption (KEMDEM) framework to the case of WIBE schemes. We propose and prove secure one generic construction in the random oracle model, and one direct construction in the standard model.