2001 | OriginalPaper | Buchkapitel
Efficient and Non-interactive Non-malleable Commitment
verfasst von : Giovanni Di Crescenzo, Jonathan Katz, Rafail Ostrovsky, Adam Smith
Erschienen in: Advances in Cryptology — EUROCRYPT 2001
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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We present new constructions of non-malleable commitment schemes, in the public parameter model (where a trusted party makes parameters available to all parties), based on the discrete logarithm or RSA assumptions. The main features of our schemes are: they achieve near-optimal communication for arbitrarily-large messages and are non-interactive. Previous schemes either required (several rounds of) interaction or focused on achieving non-malleable commitment based on general assumptions and were thus efficient only when committing to a single bit. Although our main constructions are for the case of perfectly-hiding commitment, we also present a communication-efficient, non-interactive commitment scheme (based on general assumptions) that is perfectly binding.