An Efficient Adaptive-ID Secure Revocable Hierarchical Identity-Based Encryption Scheme

摘要

User revocation is an important functional requirement in hierarchical identity-based encryption (HIBE) scheme from the point of practical applications. In this paper, we propose a revocable HIBE scheme with constant ciphertext size and prove it is semantic secure under the strong adaptive-ID model by employing the recent dual system encryption methodology and predicate encoding technique.