منابع مشابه
Efficient and Non-interactive Non-malleable Commitment
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 noninteractive. Previous schemes either required (several rounds ...
متن کاملAn Efficient Adaptive-Deniable-Concurrent Non-malleable Commitment Scheme
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 adaptived...
متن کاملCompletely Non-malleable Schemes
An encryption scheme is non-malleable if the adversary cannot transform a ciphertext into one of a related message under the given public key. Although providing a very strong security property, some application scenarios like the recently proposed key-substitution attacks yet show the limitations of this notion. In such settings the adversary may have the power to transform the ciphertext and ...
متن کاملEecient and Non-interactive Non-malleable Commitment
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...
متن کاملThe Non-interactive Equivocable Non-malleable Commitment and its Applications
Under the assumption of the existence of one-way functions, we prove that it is possible to construct the non-interactive equivocable non-malleable commitment scheme. Especially importantly, we succeed in implementing concurrent zero-knowledge using our commitment scheme, analysising properties of this concurrent zero-knowledge proof system, comparing it with the existed concurrent zero-knowled...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cryptology
سال: 2009
ISSN: 0933-2790,1432-1378
DOI: 10.1007/s00145-009-9043-4