Cryptology ePrint Archive: Report 2012/716

Attribute-Based Functional Encryption on Lattices

Xavier Boyen

Abstract: We introduce a broad lattice manipulation technique for expressive cryptography, and use it to realize functional encryption for access structures from post-quantum hardness assumptions.

Specifically, we build an efficient key-policy attribute-based encryption scheme, and prove its security in the selective sense from learning-with-errors intractability in the standard model.

Category / Keywords: public-key cryptography / Expressive cryptography, functional encryption, ABE, LWE, lattices.

Publication Info: TCC 2013 (to appear)

Date: received 21 Dec 2012, last revised 31 Dec 2012

Contact author: xb at boyen org

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Version: 20121231:150710 (All versions of this report)

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