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CRYPTO
2003
Springer
156views Cryptology» more  CRYPTO 2003»
13 years 10 months ago
Fast Algebraic Attacks on Stream Ciphers with Linear Feedback
Many popular stream ciphers apply a filter/combiner to the state of one or several LFSRs. Algebraic attacks on such ciphers [10, 11] are possible, if there is a multivariate relat...
Nicolas Courtois
EUROCRYPT
2003
Springer
13 years 10 months ago
Algebraic Attacks on Stream Ciphers with Linear Feedback
A classical construction of stream ciphers is to combine several LFSRs and a highly non-linear Boolean function f. Their security is usually analysed in terms of correlation attack...
Nicolas Courtois, Willi Meier
CRYPTO
2000
Springer
124views Cryptology» more  CRYPTO 2000»
13 years 9 months ago
Fast Correlation Attacks through Reconstruction of Linear Polynomials
The task of a fast correlation attack is to efficiently restore the initial content of a linear feedback shift register in a stream cipher using a detected correlation with the out...
Thomas Johansson, Fredrik Jönsson
CRYPTO
2004
Springer
120views Cryptology» more  CRYPTO 2004»
13 years 10 months ago
Rewriting Variables: The Complexity of Fast Algebraic Attacks on Stream Ciphers
Recently proposed algebraic attacks [2, 6] and fast algebraic attacks [1, 5] have provided the best analyses against some deployed LFSR-based ciphers. The process complexity is exp...
Philip Hawkes, Gregory G. Rose
EUROCRYPT
1999
Springer
13 years 9 months ago
Improved Fast Correlation Attacks on Stream Ciphers via Convolutional Codes
Abstract. This paper describes new methods for fast correlation attacks, based on the theory of convolutional codes. They can be applied to arbitrary LFSR feedback polynomials, in ...
Thomas Johansson, Fredrik Jönsson