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!

4E 76 76 6B 20 71 76 69 33 20 00 76 7C 20 7A 76
73 7D 6C 6B 20 76 75 6C 20 74 76 79 6C 20 6A 6F
68 73 73 6C 75 6E 6C 20 70 75 20 00 76 7C 79 20
71 76 7C 79 75 6C 00 35 20 5B 6F 70 7A 20 76 75
6C 20 7E 68 7A 20 6D 68 70 79 73 00 20 6C 68 7A
00 20 7B 76 20 6A 79 68 6A 72 35 20 5E 68 7A 75
2E 7B 20 70 7B 46 20 38 39 3F 20 72 6C 00 7A 20
70 7A 20 68 20 78 7C 70 7B 6C 20 7A 74 68 73 73
20 72 6C 00 7A 77 68 6A 6C 33 20 7A 76 20 70 7B
20 7A 6F 76 7C 73 6B 75 2E 7B 20 6F 68 7D 6C 20
7B 68 72 6C 75 20 00 76 7C 20 7B 76 76 20 73 76
75 6E 20 7B 76 20 6B 6C 6A 79 00 77 7B 20 7B 6F
70 7A 20 74 6C 7A 7A 68 6E 6C 35 20 5E 6C 73 73
20 6B 76 75 6C 33 20 00 76 7C 79 20 7A 76 73 7C
7B 70 76 75 20 70 7A 20 74 74 6D 6B 74 6F 75 69
69 6C 68 6D 35