New Proof Methods for Attribute-Based Encryption: Achieving Full Security through Selective Techniques

We develop a new methodology for utilizing the prior techniques to prove selective security for functional encryption systems as a direct ingredient in devising proofs of full security. This deepens the relationship between the selective and full security models and provides a path for transferring the best qualities of selectively secure systems to fully secure systems. In particular, we present a Ciphertext-Policy Attribute-Based Encryption scheme that is proven fully secure while matching the efficiency of the state of the art selectively secure systems.

• Type: Journal
• Year: 2012
• Where: CRYPTO
• Authors: Allison B. Lewko, Brent Waters
• Keywords: CRYPTO 2012, Cryptology, Full Security, Secure Systems, Security Models