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• W2131388963 endingPage "148" @default.
• W2131388963 startingPage "131" @default.
• W2131388963 abstract "Suppose we have a signature scheme for signing elements of message space (mathcal{M}_1), but we need to sign messages from (mathcal{M}_2). The traditional approach of applying a collision resistant hash function from (mathcal{M}_1) to (mathcal{M}_2) can be inconvenient when the signature scheme is used within more complex protocols, for example if we want to prove knowledge of a signature. Here, we present an alternative approach in which we can combine a signature for (mathcal{M}_1), a pairwise independent hash function with key space (mathcal{M}_1) and message space (mathcal{M}_2), and a non-interactive zero knowledge proof system to obtain a signature scheme for message space (mathcal{M}_2). This transform also removes any dependence on state in the signature for (mathcal{M}_1).As a result of our transformation we obtain a new signature scheme for signing a vector of group elements that is based only on the decisional linear assumption (DLIN). Moreover, the public keys and signatures of our scheme consist of group elements only, and a signature is verified by evaluating a set of pairing-product equations, so the result is a structure-preserving signature. In combination with the Groth-Sahai proof system, such a signature scheme is an ideal building block for many privacy-enhancing protocols." @default.
• W2131388963 created "2016-06-24" @default.
• W2131388963 creator A5016806686 @default.
• W2131388963 creator A5067058725 @default.
• W2131388963 date "2012-01-01" @default.
• W2131388963 modified "2023-09-23" @default.
• W2131388963 title "A New Hash-and-Sign Approach and Structure-Preserving Signatures from DLIN" @default.
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• W2131388963 doi "https://doi.org/10.1007/978-3-642-32928-9_8" @default.
• W2131388963 hasPublicationYear "2012" @default.
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