Esempio sul DES
B = BABBUINO
B 01000010 8
A 01000001 16
B 01000010 24
B 01000010 32
U 01010101 40
I 01001001 48
N 01001110 56
O 01001111 64
5 1 6 2 7 3 8 4
TI
11111111
00010000
11010000
10110010
00000000
00000000
11100000
11001101
S[0]
D[0]
010 1 0010 8
011 0 1110 16
101 0 1011 24
000 0 0010 32
010 0 0110 40
011 0 0111 48
000 0 0010 56
111 1 0001 64
K =
1 2 3 4 7 6 5
CONTROLLO
non considerata
8
TK
8 BITS
7 BITS
1000010
0101100
1110100
1101000
0111111
1001100
1000000
1100001
s[0]
d[0]
28 bits
28 bits
64 bits
56 bits
per colonne pari e poi dispari
32 bit
32 bit
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