Efficient chosen-ciphertext secure identity-based encryption with wildcards
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.