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- W2408327287 abstract "We present a new framework for proving fully black-box separations and lower bounds. We prove a general theorem that facilitates the proofs of fully black-box lower bounds from a one-way function (OWF).Loosely speaking, our theorem says that in order to prove that a fully black-box construction does not securely construct a cryptographic primitive Q (e.g., a pseudo-random generator or a universal one-way hash function) from a OWF, it is enough to come up with a large enough set of functions $mathcal{F}$ and a parameterized oracle (i.e., an oracle that is defined for every fe{0,1}n#8594;{0,1}n) such that $mathcal{O}_{f}$ breaks the security of the construction when instantiated with f and the oracle satisfies two local properties.Our main application of the theorem is a lower bound of Ω(n/log(n)) on the number of calls made by any fully black-box construction of a universal one-way hash function (UOWHF) from a general one-way function. The bound holds even when the OWF is regular, in which case it matches to a recent construction of Barhum and Maurer [4]." @default.
- W2408327287 created "2016-06-24" @default.
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- W2408327287 date "2012-01-01" @default.
- W2408327287 modified "2023-09-27" @default.
- W2408327287 title "A Cookbook for Black-Box Separations and a Recipe for UOWHFs." @default.
- W2408327287 hasPublicationYear "2012" @default.
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