Concurrent non-malleable zero-knowledge and simultaneous resettable non-malleable zero-knowledge in constant rounds
نویسندگان
چکیده
منابع مشابه
Statistical Concurrent Non-malleable Zero Knowledge
The notion of Zero Knowledge introduced by Goldwasser, Micali and Rackoff in STOC 1985 is fundamental in Cryptography. Motivated by conceptual and practical reasons, this notion has been explored under stronger definitions. We will consider the following two main strengthened notions. Statistical Zero Knowledge: here the zero-knowledge property will last forever, even in case in future the adve...
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Concurrent non-malleable zero-knowledge (NMZK) considers the concurrent execution of zero-knowledge protocols in a setting where the attacker can simultaneously corrupt multiple provers and verifiers. Barak, Prabhakaran and Sahai (FOCS’06) recently provided the first construction of a concurrent NMZK protocol without any set-up assumptions. Their protocol, however, is only computationally sound...
متن کاملConcurrent Non-Malleable Zero Knowledge with Adaptive Inputs
Concurrent non-malleable zero-knowledge (CNMZK) considers the concurrent execution of zero-knowledge protocols in a setting where the attacker can simultaneously corrupt multiple provers and verifiers. We provide the first construction of a CNMZK protocol that, without any trusted set-up, remains secure even if the attacker may adaptively select the statements to receive proofs of; previous wor...
متن کاملEfficiency Preserving Transformations for Concurrent Non-malleable Zero Knowledge
Ever since the invention of Zero-Knowledge by Goldwasser, Micali, and Rackoff [1], Zero-Knowledge has become a central building block in cryptography with numerous applications, ranging from electronic cash to digital signatures. The properties of Zero-Knowledge range from the most simple (and not particularly useful in practice) requirements, such as honest-verifier zero-knowledge to the most ...
متن کاملAdaptive Security of Concurrent Non-Malleable Zero-Knowledge
A zero-knowledge protocol allows a prover to convince a verifier of the correctness of a statement without disclosing any other information to the verifier. It is a basic tool and widely used in many other cryptographic applications. However, when stand-alone zero-knowledge protocols are used in complex environments, e.g., the Internet, the basic properties may not be sufficient. This is why re...
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ژورنال
عنوان ژورنال: Cybersecurity
سال: 2018
ISSN: 2523-3246
DOI: 10.1186/s42400-018-0014-7