This expression appears on my cryptography homework:
$G'(k) = G(k \oplus 1^s)$
It is a description of a Pseudorandom Number Generator where $G:\{0,1\}^s \to \{0,1\}^n$
I just cant see what the "prime" adds, to me it would read the same as:
$G(k) = k \oplus 1^s$
Am I missing something?