RF(Round Function) function

RFa|b(x)=CP(|((a?x+b) mod (264+13))mod 264|64)

• Input: x 64-bit

• parameters : a, b 64-bit string

CP (Confusion Permutation)

CP(y) = |(yr? RT(trunc6(yl)))|(yl?KC)+KD mod 264|64

• Input: y=yl|yr two 32-bit string

• parameters : KC 32-bit, KD 64-bit string

RT (Round Table)

6-bit integer for input and 32-bit string output

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