Sciweavers

2412 search results - page 49 / 483
» Which Problems Have Strongly Exponential Complexity
Sort
View
115
Voted
FOCS
2007
IEEE
15 years 9 months ago
Parameterized Proof Complexity
We propose a proof-theoretic approach for gaining evidence that certain parameterized problems are not fixedparameter tractable. We consider proofs that witness that a given prop...
Stefan S. Dantchev, Barnaby Martin, Stefan Szeider
131
Voted
CORR
2010
Springer
149views Education» more  CORR 2010»
15 years 2 months ago
Lower Bounds for the Complexity of Monadic Second-Order Logic
Courcelle's famous theorem from 1990 states that any property of graphs definable in monadic second-order logic (MSO2) can be decided in linear time on any class of graphs of ...
Stephan Kreutzer, Siamak Tazari
137
Voted
CANS
2007
Springer
150views Cryptology» more  CANS 2007»
15 years 8 months ago
Perfectly Secure Message Transmission in Directed Networks Tolerating Threshold and Non Threshold Adversary
Abstract. In this paper we study Perfectly Secure Message Transmission (PSMT) between a sender S and a receiver R, connected in a directed synchronous network through multiple para...
Arpita Patra, Bhavani Shankar, Ashish Choudhary, K...
134
Voted
IACR
2011
155views more  IACR 2011»
14 years 2 months ago
Terminating BKZ
Strong lattice reduction is the key element for most attacks against lattice-based cryptosystems. Between the strongest but impractical HKZ reduction and the weak but fast LLL redu...
Guillaume Hanrot, Xavier Pujol, Damien Stehl&eacut...
145
Voted
CRYPTO
2011
Springer
191views Cryptology» more  CRYPTO 2011»
14 years 2 months ago
Analyzing Blockwise Lattice Algorithms Using Dynamical Systems
Strong lattice reduction is the key element for most attacks against lattice-based cryptosystems. Between the strongest but impractical HKZ reduction and the weak but fast LLL redu...
Guillaume Hanrot, Xavier Pujol, Damien Stehl&eacut...