Efficient identity-based encryption without random oracles. (English) Zbl 1137.94360

Cramer, Ronald (ed.), Advances in cryptology – EUROCRYPT 2005. 24th annual international conference on the theory and applications of cryptographic techniques, Aarhus, Denmark, May 22–26, 2005. Proceedings. Berlin: Springer (ISBN 3-540-25910-4/pbk). Lecture Notes in Computer Science 3494, 114-127 (2005).
Summary: We present the first efficient Identity-Based Encryption (IBE) scheme that is fully secure without random oracles. We first present our IBE construction and reduce the security of our scheme to the decisional Bilinear Diffie-Hellman (BDH) problem. Additionally, we show that our techniques can be used to build a new signature scheme that is secure under the computational Diffie-Hellman assumption without random oracles.
For the entire collection see [Zbl 1107.94001].


94A60 Cryptography
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