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» On the Complexity of the Interlace Polynomial
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ICDT
2009
ACM
173views Database» more  ICDT 2009»
16 years 7 months ago
Containment of conjunctive queries on annotated relations
We study containment and equivalence of (unions of) conjunctive queries on relations annotated with elements of a commutative semiring. Such relations and the semantics of positiv...
Todd J. Green
PKC
2009
Springer
102views Cryptology» more  PKC 2009»
16 years 7 months ago
A Practical Key Recovery Attack on Basic TCHo
TCHo is a public key encryption scheme based on a stream cipher component, which is particular suitable for low cost devices like RFIDs. In its basic version, TCHo offers no IND-CC...
Mathias Herrmann, Gregor Leander
CADE
2006
Springer
16 years 6 months ago
Stratified Context Unification Is NP-Complete
Context Unification is the problem to decide for a given set of second-order equations E where all second-order variables are unary, whether there exists a unifier, such that for e...
Jordi Levy, Manfred Schmidt-Schauß, Mateu Vi...
STOC
2002
ACM
80views Algorithms» more  STOC 2002»
16 years 6 months ago
Strict polynomial-time in simulation and extraction
The notion of efficient computation is usually identified in cryptography and complexity with (strict) probabilistic polynomial time. However, until recently, in order to obtain c...
Boaz Barak, Yehuda Lindell
FOCS
2008
IEEE
16 years 27 days ago
Hardness of Minimizing and Learning DNF Expressions
We study the problem of finding the minimum size DNF formula for a function f : {0, 1}d → {0, 1} given its truth table. We show that unless NP ⊆ DTIME(npoly(log n) ), there i...
Subhash Khot, Rishi Saket