Key Schedule
Incomplete Feistel network used for keys
- Use oct-rounds instead of quad-rounds
- Apply a total of 24 oct-rounds (1-24) and use even outputs for quad round keys
- If even oct-round output is ABCDEFGH, then
- km,1=B, km,2=D, km,3=F, km,4=H
- kr,1=5LSB(A), kr,2=5LSB(C), kr,3=5LSB(E), kr,4=5LSB(G)