id: 06086075 dt: a an: 06086075 au: Lewko, Allison; Waters, Brent ti: New proof methods for attribute-based encryption: achieving full security through selective techniques. so: Safavi-Naini, Reihaneh (ed.) et al., Advances in cryptology ‒ CRYPTO 2012. 32nd annual cryptology conference, Santa Barbara, CA, USA, August 19‒23, 2012. Proceedings. Berlin: Springer (ISBN 978-3-642-32008-8/pbk). Lecture Notes in Computer Science 7417, 180-198 (2012). py: 2012 pu: Berlin: Springer la: EN cc: ut: ci: li: doi:10.1007/978-3-642-32009-5_12 ab: Summary: 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. rv: