Fast Walsh Transform |
A version of this applet using Sun's Java plug-in is available here.Fast Walsh Transform AppletThis applet performs the Walsh transform on its inputs.This transform is useful for computing the non-linearity of boolean functions with arbitrary numbers of inputs - an attribute of interest to designers of cyphers. Type in the entries in the logic table of the boolean function on the left - e.g. 1 0 0 1 0 1 1 0. Put spaces, commas or carraige returns between the entries. Then hit the button to perform the transform. The source code is available here:
Links to Ritter's web pages[Measuring Boolean Function Nonlinearity by Walsh Transform][Walsh-Hadamard Transforms - a literature survey] [Active Boolean Function Nonlinearity Measurement in JavaScript] |