January 29, 2002
Practical Aspects of Modern Cryptography
15
Rijndael Key Schedule
…
k11
k10
k9
k8
k7
k6
k5
k4
k3
k2
k1
k0
…
Round key 2
Round key 1
Round key 0
nThe key schedule is defined on 4-byte words by
n
nki = ki-4 Ä ki-1 when i is not a multiple of 4
nki = ki-4 Ä f(ki-1) when i is a multiple of 4