Cryptology ePrint Archive: Report 2010/288

Lattice-based Identity-Based Broadcast Encryption Scheme

Jin Wang and Jingguo Bi

Abstract: Motivated by the lattice basis delegation technique due to [8], we propose an adaptively secure identity-based broadcast encryption(IBBE) scheme based on the hard worst-case lattice problems. Our construction can be generalized to obtain a hierarchical IBBE (HIBBE) scheme easily. To the best of the authors' knowledge, our construction and its variants constitute the first adaptively secure IBBE schemes from lattices, which are believed secure in the post-quantum environment.

Category / Keywords: public-key cryptography / lattice techniques,broadcast,public-key cryptography

Date: received 14 May 2010, last revised 10 Jul 2010

Contact author: jimiwang at tsinghua edu cn

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Version: 20100710:103327 (All versions of this report)

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