SAFER+ Key Schedule (This is the key schedule diagram for 128 bit key)

User-Selected Key (16 Bytes)

Compute Parity Byte

Insert as 17th Byte

Expanded Key (17 Bytes)

Select Bytes 1,2,…16

Rotate each Byte 3 bits left

(17 Bytes)

Select Bytes 2,3,…,17

Rotate each Byte 3 bits left

(17 Bytes)

Select Bytes 3,4,…,17,1

Rotate each Byte 3 bits left

(17 Bytes)

Select Bytes 17,1,2…,15

K2

K1

B2

?

B3

?

K3

B17

?

K17

bytewise mod 256 addition

? :

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