Fully Secure Functional Encryption with General Relations from the Decisional Linear Assumption

This paper presents a fully secure functional encryption scheme for a wide class of relations, that are specified by non-monotone access structures combined with inner-product relations. The security is proven under a standard assumption, the decisional linear (DLIN) assumption, in the standard model. The proposed functional encryption scheme covers, as special cases, (1) key-policy and ciphertext-policy attribute-based encryption with nonmonotone access structures, and (2) (hierarchical) predicate encryption with inner-product relations and functional encryption with non-zero inner-product relations. ded abstract was presented at Advances in Cryptology

• Type: Conference
• Year: 2010
• Where: CRYPTO
• Authors: Tatsuaki Okamoto, Katsuyuki Takashima
• Keywords: CRYPTO 2010, Cryptology, Functional Encryption Scheme, Inner-product Relations, Secure Functional Encryption