PPT Slide

Key Schedule(bitslice mode)

User supplied key + padding

w-7

w-6

w-5

w-4

w-3

w-1

w-8

w-2

wi := (wi-8 ^ wi-5 ^ wi-3 ^ wi-1 ^ F ^ i) <<< 11

F =0x9e3779b9, i = 0,1,……, 131

{k4i , k4i+1 , k4i+2 , k4i+3}:= S(35-i)%8(w4i , w4i+1, w4i+2, w4i+3)

i = 0,1,……, 32

Ki:= {k4i , k4i+1, k4i+2, k4i+3} i=0,…32

256-bit

128-bit

prekeys

roundkeys

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