Step 3f: Compute R

• Rn = Ln–1 ? f (Rn–1, Kn)

• Example:

  L0: 1100 1100 0000 0000 1100 1100 1111 1111
  
  f : ? 0010 0011 0100 1010 1010 1001 1011 1011
  R1: 1110 1111 0100 1010 0110 0101 0100 0100

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