Step 3a: Round 1
16 rounds (1 ? n ? 16)
- Ln = Rn–1
- Rn = Ln–1 ? f (Rn–1, Kn)
- 32-bit data
- 48-bit key
- 32-bit results
Right side is a calculation
Example
K1 = 000110 110000 001011 101111 111111 000111 000001 110010
L1 = R0 = 1111 0000 1010 1010 1111 0000 1010 1010
R1 = L0 + f (R0, K1)