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!

5A 02 02 77 20 7D 02 75 3F 20 0C 02 08 20 06 02
7F 09 78 77 20 02 01 78 20 00 02 05 78 20 76 7B
74 7F 7F 78 01 7A 78 20 7C 01 20 0C 02 08 05 20
7D 02 08 05 01 78 0C 41 20 67 7B 7C 06 20 02 01
78 20 0A 74 06 20 79 74 7C 05 7F 0C 20 78 74 06
0C 20 07 02 20 76 05 74 76 7E 41 20 6A 74 06 01
3A 07 20 7C 07 52 20 44 45 4B 20 7E 78 0C 06 20
7C 06 20 74 20 04 08 7C 07 78 20 06 00 74 7F 7F
20 7E 78 0C 06 03 74 76 78 3F 20 06 02 20 7C 07
20 06 7B 02 08 7F 77 01 3A 07 20 7B 74 09 78 20
07 74 7E 78 01 20 0C 02 08 20 07 02 02 20 7F 02
01 7A 20 07 02 20 77 78 76 05 0C 03 07 20 07 7B
7C 06 20 00 78 06 06 74 7A 78 41 20 6A 78 7F 7F
20 77 02 01 78 3F 20 0C 02 08 05 20 06 02 7F 08
07 7C 02 01 20 7C 06 20 00 00 79 77 00 7B 01 75
75 78 74 79 41