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IEICE TRANSACTIONS on Fundamentals

An Efficient Adaptive-Deniable-Concurrent Non-malleable Commitment Scheme

Seiko ARITA

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Summary :

It is known that composable secure commitments, that is, concurrent non-malleable commitments exist in the plain model, based only on standard assumptions such as the existence of claw-free permutations or even one-way functions. Since being based on the plain model, the deniability of them is trivially satisfied, and especially the latter scheme satisfies also adaptivity, hence it is adaptive-deniable-concurrent non-malleable. However, those schemes cannot be said to be practically efficient. We show a practically efficient (string) adaptive-deniable-concurrent commitment scheme is possible under a global setup model, called the Global CRS-KR model.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E94-A No.1 pp.367-382
Publication Date
2011/01/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E94.A.367
Type of Manuscript
PAPER
Category
Cryptography and Information Security

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