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!

1B 43 43 38 20 3E 43 36 00 20 4D 43 49 20 47 43
40 4A 39 38 20 43 42 39 20 41 43 46 39 20 37 3C
35 40 40 39 42 3B 39 20 3D 42 20 4D 43 49 46 20
3E 43 49 46 42 39 4D 02 20 28 3C 3D 47 20 43 42
39 20 4B 35 47 20 3A 35 3D 46 40 4D 20 39 35 47
4D 20 48 43 20 37 46 35 37 3F 02 20 2B 35 47 42
7B 48 20 3D 48 13 20 05 06 0C 20 3F 39 4D 47 20
3D 47 20 35 20 45 49 3D 48 39 20 47 41 35 40 40
20 3F 39 4D 47 44 35 37 39 00 20 47 43 20 3D 48
20 47 3C 43 49 40 38 42 7B 48 20 3C 35 4A 39 20
48 35 3F 39 42 20 4D 43 49 20 48 43 43 20 40 43
42 3B 20 48 43 20 38 39 37 46 4D 44 48 20 48 3C
3D 47 20 41 39 47 47 35 3B 39 02 20 2B 39 40 40
20 38 43 42 39 00 20 4D 43 49 46 20 47 43 40 49
48 3D 43 42 20 3D 47 20 41 41 3A 38 41 3C 42 36
36 39 35 3A 02