Cryptology ePrint Archive: Report 2008/020

CCA2 Secure IBE: Standard Model Efficiency through Authenticated Symmetric Encryption

Eike Kiltz and Yevgeniy Vahlis

Abstract: We propose two constructions of chosen-ciphertext secure identity-based encryption (IBE) schemes. Our schemes have a security proof in the standard model, yet they offer performance competitive with all known random-oracle based schemes. The efficiency improvement is obtained by combining modifications of the IBE schemes by Waters and Gentry with authenticated symmetric encryption.

Category / Keywords: public-key cryptography /

Publication Info: CT-RSA 2008

Date: received 15 Jan 2008, last revised 23 Jun 2008

Contact author: evahlis at cs toronto edu

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Version: 20080623:162600 (All versions of this report)

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