Cryptography Reference
In-Depth Information
Output
Index
t
r
Round
r
Bytes of the Permutation
S
r
i
0
1
2
3
4
5
. . .
N −
2
N −
1
a
0
a
1
a
2
a
3
a
4
a
5
. . .
a
254
a
255
0
1
1
a
1
a
0
a
2
a
3
a
4
a
5
. . .
a
254
a
255
a
0
+
a
1
2
2
a
2
a
0
a
1
a
3
a
4
a
5
. . .
a
254
a
255
a
1
+
a
2
3
3
a
3
a
0
a
1
a
2
a
4
a
5
. . .
a
254
a
255
a
2
+
a
3
.
.
.
.
.
.
.
.
.
.
.
.
255
255
a
255
a
0
a
1
a
2
a
3
a
4
. . .
a
253
a
254
a
254
+
a
255
256
0
a
255
a
0
a
1
a
2
a
3
a
4
. . .
a
253
a
254
2
a
255
257
1
a
0
a
255
a
1
a
2
a
3
a
4
. . .
a
253
a
254
a
0
+
a
255
258
2
a
1
a
255
a
0
a
2
a
3
a
4
. . .
a
253
a
254
a
0
+
a
1
259
3
a
2
a
255
a
0
a
1
a
3
a
4
. . .
a
253
a
254
a
1
+
a
2
260
4
a
3
a
255
a
0
a
1
a
2
a
4
. . .
a
253
a
254
a
2
+
a
3
.
.
.
.
.
.
.
.
.
.
.
.
511
255
a
254
a
255
a
0
a
1
a
2
a
3
. . .
a
252
a
253
a
253
+
a
254
512
0
a
254
a
255
a
0
a
1
a
2
a
3
. . .
a
252
a
253
2
a
254
513
1
a
255
a
254
a
0
a
1
a
2
a
3
. . .
a
252
a
253
a
254
+
a
255
514
2
a
0
a
254
a
255
a
1
a
2
a
3
. . .
a
252
a
253
a
0
+
a
255
515
3
a
1
a
254
a
255
a
0
a
2
a
3
. . .
a
252
a
253
a
0
+
a
1
a
2
a
254
a
255
a
0
a
1
a
3
. . .
a
252
a
253
a
1
+
a
2
516
4
.
.
.
.
.
.
.
.
.
.
.
.
TABLE 8.1: Evolution of the permutation during StuckPRGA with j
G
stuck
at 0.
