Shift cryptosystem on Free alphabetic string monoid on A-Z
HAPPYFRIDAYYAY
KDSSBIULGDBBDB
HAPPYFRIDAYYAY
Affine cryptosystem on Free alphabetic string monoid on A-Z
(3, 13)
LETSHANGOUT
20
UZSPINAFDVS
LETSHANGOUT
yes
9
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
6
5
4
3
2
1
0
3
1
10098
1
1840
919
23