An Efficient Public-Key Attribute-Based Broadcast Encryption Scheme Allowing Arbitrary Access Policies

Provided by: Association for Computing Machinery
Topic: Security
Format: PDF
The authors describe a new public-key and provably secure attribute-based broadcast encryption scheme which supports complex access policies with AND, OR and NOT gates. Their scheme, especially targeting the implementation of efficient pay-TV systems, can handle conjunctions of disjunctions by construction and disjunctions of conjunctions by concatenations, which are the most general forms of boolean expressions. It is based on a modification of the boneh-gentry-waters broadcast encryption scheme in order to achieve attribute collusion resistance and to support complex boolean access policies.

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