I guess you are done with Caesar I, aren't you?
The big problem with caesar is that it does not allow digits or other characters.
I have fixed this, and now I can use any ascii character in the plaintext.
The keyspace has increased from 26 to 128 too. \o/

Enjoy!

15 3D 3D 32 20 38 3D 30 7A 20 47 3D 43 20 41 3D
3A 44 33 32 20 3D 3C 33 20 3B 3D 40 33 20 31 36
2F 3A 3A 33 3C 35 33 20 37 3C 20 47 3D 43 40 20
38 3D 43 40 3C 33 47 7C 20 22 36 37 41 20 3D 3C
33 20 45 2F 41 20 34 2F 37 40 3A 47 20 33 2F 41
47 20 42 3D 20 31 40 2F 31 39 7C 20 25 2F 41 3C
75 42 20 37 42 0D 20 7F 00 06 20 39 33 47 41 20
37 41 20 2F 20 3F 43 37 42 33 20 41 3B 2F 3A 3A
20 39 33 47 41 3E 2F 31 33 7A 20 41 3D 20 37 42
20 41 36 3D 43 3A 32 3C 75 42 20 36 2F 44 33 20
42 2F 39 33 3C 20 47 3D 43 20 42 3D 3D 20 3A 3D
3C 35 20 42 3D 20 32 33 31 40 47 3E 42 20 42 36
37 41 20 3B 33 41 41 2F 35 33 7C 20 25 33 3A 3A
20 32 3D 3C 33 7A 20 47 3D 43 40 20 41 3D 3A 43
42 37 3D 3C 20 37 41 20 3B 3B 34 32 3B 36 3C 30
30 33 2F 34 7C