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Is it possible that we take a $PRG$ $G(k)$ of stretch $n\cdot2^n$, and read its output as the table of a $PRF$ $F(K)$ with input and output size of $n$?

Intuitively it sounds possible however I read it somewhere that this may not be done.

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  • $\begingroup$ Do you mean $\: n\cdot 2^{\hspace{.02 in}n} \;$? $\;\;\;$ (Instead of $\: n.2^n \;$.) $\;\;\;\;\;\;\;\;$ $\endgroup$ – user991 Mar 18 '15 at 3:51
  • $\begingroup$ Yes. Sorry for the typo $\endgroup$ – user1 Mar 18 '15 at 12:06
  • $\begingroup$ Still no comments :) ? $\endgroup$ – user1 Apr 7 '15 at 17:34

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