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!

3C 64 64 59 20 5F 64 57 21 20 6E 64 6A 20 68 64
61 6B 5A 59 20 64 63 5A 20 62 64 67 5A 20 58 5D
56 61 61 5A 63 5C 5A 20 5E 63 20 6E 64 6A 67 20
5F 64 6A 67 63 5A 6E 23 20 49 5D 5E 68 20 64 63
5A 20 6C 56 68 20 5B 56 5E 67 61 6E 20 5A 56 68
6E 20 69 64 20 58 67 56 58 60 23 20 4C 56 68 63
1C 69 20 5E 69 34 20 26 27 2D 20 60 5A 6E 68 20
5E 68 20 56 20 66 6A 5E 69 5A 20 68 62 56 61 61
20 60 5A 6E 68 65 56 58 5A 21 20 68 64 20 5E 69
20 68 5D 64 6A 61 59 63 1C 69 20 5D 56 6B 5A 20
69 56 60 5A 63 20 6E 64 6A 20 69 64 64 20 61 64
63 5C 20 69 64 20 59 5A 58 67 6E 65 69 20 69 5D
5E 68 20 62 5A 68 68 56 5C 5A 23 20 4C 5A 61 61
20 59 64 63 5A 21 20 6E 64 6A 67 20 68 64 61 6A
69 5E 64 63 20 5E 68 20 62 62 5B 59 62 5D 63 57
57 5A 56 5B 23