Improved Efficiency for CCA-Secure Cryptosystems Built Using Identity Based Encryption

Authors: D. Boneh and J. Katz

Recently, Canetti, Halevi, and Katz showed a general method for constructing CCA-secure encryption from identity-based encryption in the standard model. We improve the efficiency of their construction, and show two specific instantiations of our resulting scheme which offer the most efficient encryption (and, in one case, key generation) of any CCA-secure encryption scheme to date in the standard model.

In proceedings of RSA-CT '05, LNCS 3376, pp. 87-103, 2005

Full paper: pdf         [first posted 10/2004 ]