Welcome to the resource topic for 2005/412
Title:
Constant-Size Hierarchical Identity-Based Signature/Signcryption without Random Oracles
Authors: Tsz Hon Yuen, Victor K. Wei
Abstract:We construct the first constant-size hierarchical identity-based signature (HIBS) without random oracles - the signature size is O(\lambda_s) bits, where \lambda_s is the security parameter, and it is independent of the number of levels in the hierarchy.
We observe that an efficient hierarchical identity-based signcryption (HIBSC) scheme without random oracles can be compositioned from our HIBS and Boneh, Boyen, and Goh’s hierarchical identity-based encryption (HIBE). We further optimize it to a constant-factor efficiency improvement. This is the first constant-size HIBSC without random oracles.
ePrint: https://eprint.iacr.org/2005/412
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