[Resource Topic] 2004/173: Secure Identity Based Encryption Without Random Oracles

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Secure Identity Based Encryption Without Random Oracles

Authors: Dan Boneh, Xavier Boyen


We present a fully secure identity based encryption scheme whose proof of security does not rely on the random oracle heuristic. Security is based on the decisional bilinear Diffie-Hellman assumption. Previous constructions of this type incurred a large penalty factor in the security reduction from the underlying complexity assumption. The security reduction of the present system is polynomial in all the parameters.

ePrint: https://eprint.iacr.org/2004/173

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