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- W2521451511 abstract "We construct the first general secure computation protocols that require no trusted infrastructure other than authenticated communication, and that satisfy a meaningful notion of security that is preserved under universal composition---assuming only the existence of enhanced trapdoor permutations. The notion of security fits within a generalization of the “angel-based” framework of Prabhakaran and Sahai [STOC'04, ACM, New York, 2004, pp. 242--251] and implies superpolynomial-time simulation security. Security notions of this kind are currently known to be realizable only under strong and specific hardness assumptions. A key element in our construction is a commitment scheme that satisfies a new and strong notion of security. The notion, security against chosen-commitment attacks (CCA security), means that security holds even if the attacker has access to an extraction oracle that gives the adversary decommitment information to commitments of the adversary's choice. This notion is stronger than concurrent nonmalleability and is of independent interest. We construct CCA-secure commitments based on standard one-way functions, and with no trusted setup. To the best of our knowledge, this provides the first construction of a natural cryptographic primitive having adaptive hardness from standard hardness assumptions, using no trusted setup or public keys." @default.
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- W2521451511 date "2016-01-01" @default.
- W2521451511 modified "2023-10-18" @default.
- W2521451511 title "Adaptive Hardness and Composable Security in the Plain Model from Standard Assumptions" @default.
- W2521451511 doi "https://doi.org/10.1137/110847196" @default.
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