Efficient Selective Identity-Based Encryption Without Random Oracles

Authors: D. Boneh and X. Boyen

We construct two efficient Identity Based Encryption (IBE) systems that are selective identity secure without the random oracle model Selective identity secure IBE is a slightly weaker security model than the standard security model for IBE. In this model the adversary must commit ahead of time to the identity that it intends to attack, whereas in the standard model the adversary is allowed to choose this identity adaptively. Our first secure IBE system extends to give a selective identity Hierarchical IBE secure without random oracles.

Journal of Cryptology (JOC), 24 (4):659-693, 2011.
Extended abstract in proceedings of Eurocrypt 2004, LNCS 3027, pp. 223-238, 2004   [BIBTEX]

Full paper: pdf         [first posted 6/2004 ]