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!

07 2F 2F 24 20 2A 2F 22 6C 20 39 2F 35 20 33 2F
2C 36 25 24 20 2F 2E 25 20 2D 2F 32 25 20 23 28
21 2C 2C 25 2E 27 25 20 29 2E 20 39 2F 35 32 20
2A 2F 35 32 2E 25 39 6E 20 14 28 29 33 20 2F 2E
25 20 37 21 33 20 26 21 29 32 2C 39 20 25 21 33
39 20 34 2F 20 23 32 21 23 2B 6E 20 17 21 33 2E
67 34 20 29 34 7F 20 71 72 78 20 2B 25 39 33 20
29 33 20 21 20 31 35 29 34 25 20 33 2D 21 2C 2C
20 2B 25 39 33 30 21 23 25 6C 20 33 2F 20 29 34
20 33 28 2F 35 2C 24 2E 67 34 20 28 21 36 25 20
34 21 2B 25 2E 20 39 2F 35 20 34 2F 2F 20 2C 2F
2E 27 20 34 2F 20 24 25 23 32 39 30 34 20 34 28
29 33 20 2D 25 33 33 21 27 25 6E 20 17 25 2C 2C
20 24 2F 2E 25 6C 20 39 2F 35 32 20 33 2F 2C 35
34 29 2F 2E 20 29 33 20 2D 2D 26 24 2D 28 2E 22
22 25 21 26 6E