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Attribute-based functional encryption on lattices. (English) Zbl 1310.94131

Sahai, Amit (ed.), Theory of cryptography. 10th theory of cryptography conference, TCC 2013, Tokyo, Japan, March 3–6, 2013. Proceedings. Berlin: Springer (ISBN 978-3-642-36593-5/pbk). Lecture Notes in Computer Science 7785, 122-142 (2013).
Summary: 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.
For the entire collection see [Zbl 1258.94005].

MSC:

94A60 Cryptography
Full Text: DOI