Optimal parameters for the WG stream cipher family

Cryptography and Communications, pp. 117-135, 2014.

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Keywords:
Welch-Gong (WG) transformationsStream ciphersBoolean functionsSequences94A60

Abstract:

A general structure of the Welch-Gong (WG) stream cipher family is based on filtering an m-sequence of degree l over a finite field $\ensuremath{{\mathbb{F}}}_{2^m}$ where the filtering function is a WG transformation from $\ensuremath{{\mathbb{F}}}_{2^m}$ to $\ensuremath{{\mathbb{F}}}_{2}$. For a fixed m and l, the linear span of the fil...More

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