New answers tagged

5

I read that two-round Feistel network is not a secure PRP That's easily seen:                                     It holds $P_L\oplus C_L=F_0(P_R)$. That implies a distinguishable property: for any fixed $P_R$ and whatever the round function $F_0$, when we flip bit(s) in $P_L$, that flips the corresponding bit(s) in $C_L$ and leaves the other bit(s)...


Top 50 recent answers are included