Linear Feedback Function

Tags

cryptography

Is a function used by LFSR to calculate the feedback-bit for the current state.

For [see page 9, example]: the feedback-function can be set to \[ f(X) = X_5 \xor X_8 \xor X_10 \] To mean we calculate the feedback-bit by XORing the \nth{5}, \nth{8} and \nth{10} bits of the current state.