作者: Rafail Ostrovsky , Amit Sahai , Brent Waters
关键词: On-the-fly encryption 、 Probabilistic encryption 、 Link encryption 、 Client-side encryption 、 56-bit encryption 、 Disk encryption theory 、 Public-key cryptography 、 Disk encryption hardware 、 Functional encryption 、 Attribute-based encryption 、 Filesystem-level encryption 、 40-bit encryption 、 Computer science 、 Deterministic encryption 、 Plaintext-aware encryption 、 Multiple encryption 、 Theoretical computer science 、 Encryption 、 Predicate encryption
摘要: We construct an Attribute-Based Encryption (ABE) scheme that allows a user's private key to be expressed in terms of any access formula over attributes. Previous ABE schemes were limited to expressing only monotonic access structures. We provide a proof of security for our scheme based on the Decisional Bilinear Diffie-Hellman (BDH) assumption. Furthermore, the performance of our new scheme compares favorably with existing, less-expressive schemes.