منابع مشابه
Universally Composable Undeniable Signature
How to define the security of undeniable signature schemes is a challenging task. This paper presents two security definitions of undeniable signature schemes which are more useful or natural than the existing definition. It then proves their equivalence. We first define the UC-security, where UC means universal composability. We next show that there exists a UC-secure undeniable signature sche...
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This paper shows that the security of blind signatures is, as defined by Juels, Luby and Ostrovsky, truly weaker than the security in the universal composability (UC) framework (i.e., define the ideal functionality of blind signatures), which was introduced by Canetti. That is, we formulate the security of blind signatures in the UC framework, and show that the class of UC-secure blind signatur...
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Non-linear real constraint systems with universally and/or existentially quantified variables often need be solved in such contexts as control design or sensor planning. To date, these systems are mostly handled by computing a quantifier-free equivalent form by means of Cylindrical Algebraic Decomposition (CAD). However, CAD restricts its input to be conjunctions and disjunctions of polynomial ...
متن کاملUniversally Composable Key-Management
We present the first universally composable key-management functionality, formalized in the GNUC framework by Hofheinz and Shoup. It allows the enforcement of a wide range of security policies and can be extended by diverse key usage operations with no need to repeat the security proof. We illustrate its use by proving an implementation of a security token secure with respect to arbitrary key-u...
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We call a loop universally noncommutative if it does not have a loop isotope in which two non-identity elements commute. Finite universally noncommutative loops are equivalent to latin squares that avoid the configuration:
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ژورنال
عنوان ژورنال: Nature Nanotechnology
سال: 2008
ISSN: 1748-3387,1748-3395
DOI: 10.1038/nnano.2008.376