Function lpn::lf1::xor_reduce

pub fn xor_reduce(oracle: &mut LpnOracle, b: u32)

This is the LF2 reduction. This reduction grows the number of samples.

Applies a single round reduction

$k’ = k - (a-1)*b$ $n’ = n(n-1) / 2^{b+1}$ (for a = 1) $\delta’ = \delta^2$