Efficient chosen-ciphertext secure identity-based encryption with wildcards

Ref: James Birkett, Alexander W. Dent, Gregory Neven and Jacob C. N. Schuldt. In J. Pieprzyk, H. Ghodosi, and E. Dawson, editors, 12th Australasian Conference on Information Security and Privacy - ACISP 2007, volume 4586 of Lecture Notes in Computer Science, pages 274-292. Springer-Verlag, 2007. Also available from Cryptology ePrint Archive, Report 2006/377.

Abstract: We propose new instantiations of chosen-ciphertext secure 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 (KEM--DEM) 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.

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