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!

29 51 51 46 20 4C 51 44 0E 20 5B 51 57 20 55 51
4E 58 47 46 20 51 50 47 20 4F 51 54 47 20 45 4A
43 4E 4E 47 50 49 47 20 4B 50 20 5B 51 57 54 20
4C 51 57 54 50 47 5B 10 20 36 4A 4B 55 20 51 50
47 20 59 43 55 20 48 43 4B 54 4E 5B 20 47 43 55
5B 20 56 51 20 45 54 43 45 4D 10 20 39 43 55 50
09 56 20 4B 56 21 20 13 14 1A 20 4D 47 5B 55 20
4B 55 20 43 20 53 57 4B 56 47 20 55 4F 43 4E 4E
20 4D 47 5B 55 52 43 45 47 0E 20 55 51 20 4B 56
20 55 4A 51 57 4E 46 50 09 56 20 4A 43 58 47 20
56 43 4D 47 50 20 5B 51 57 20 56 51 51 20 4E 51
50 49 20 56 51 20 46 47 45 54 5B 52 56 20 56 4A
4B 55 20 4F 47 55 55 43 49 47 10 20 39 47 4E 4E
20 46 51 50 47 0E 20 5B 51 57 54 20 55 51 4E 57
56 4B 51 50 20 4B 55 20 4B 48 49 49 43 50 4A 43
45 55 50 49 10