Titlebook: Advances in Cryptology – CRYPTO 2017; 37th Annual Internat Jonathan Katz,Hovav Shacham Conference proceedings 2017 International Associatio

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https://doi.org/10.1007/978-4-431-54457-9al round-optimal protocols, many of which were previously unknown even using non-black-box simulation techniques:.Our three-round protocols can be based on DDH or QR or . residuosity and our two-round protocols require quasi-polynomial hardness of the same assumptions. In particular, prior to this w

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https://doi.org/10.1007/978-981-19-5562-4collapsing rounds in constant-round public-coin interactive protocols. This heuristic is very popular both in theory and in practice, and its security has been the focus of extensive study..In particular, this paradigm was shown to be secure in the Random Oracle Model. However, in the plain model, t

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https://doi.org/10.1007/978-1-4684-8839-5indistinguishable from a random oracle against any polynomial-time quantum adversary that can make quantum superposition queries. In contrast, many blockcipher-based PRFs including CBC-MAC were recently broken by quantum superposition attacks..Classical proof strategies for these constructions do no

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Lessons, Outlooks, Consequences,t. In?[.], Ambainis et al. gave a definition of non-malleability for the encryption of quantum data. In this work, we show that this definition is too weak, as it allows adversaries to “inject” plaintexts of their choice into the ciphertext. We give a new definition of quantum non-malleability which

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https://doi.org/10.1007/978-0-387-78991-0sus in cryptocurrency networks. Ideally, a cryptocurrency PoW scheme should have several desired properties, including efficient verification on one hand, and high memory consumption of the prover’s algorithm on the other hand, making the scheme less attractive for implementation on dedicated hardwa

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Ahmad Fauzi Ismail,Dipak Rana,Henry C. Foley an improved preimage attack against the XOR combiner with a complexity of ., while the previous best-known complexity is .. Moreover, we find the first generic second-preimage attack on Zipper hash with an optimal complexity of ..

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