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user 121575
3
votes
1
answer
89
views
Is the first bit preserving version of a PRG also a PRG?
Given that $G$ is a pseudorandom generator from $\{0,1\}^n$ to $\{0,1\}^{l(n)}$, $G'$ defined as follows:
$G'(s) =
\begin{cases}
G(s) \space \text{if the first bit of s and G(s) are the same} \\
…
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