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!

4C 74 74 69 20 6F 74 67 31 20 7E 74 7A 20 78 74
71 7B 6A 69 20 74 73 6A 20 72 74 77 6A 20 68 6D
66 71 71 6A 73 6C 6A 20 6E 73 20 7E 74 7A 77 20
6F 74 7A 77 73 6A 7E 33 20 59 6D 6E 78 20 74 73
6A 20 7C 66 78 20 6B 66 6E 77 71 7E 20 6A 66 78
7E 20 79 74 20 68 77 66 68 70 33 20 5C 66 78 73
2C 79 20 6E 79 44 20 36 37 3D 20 70 6A 7E 78 20
6E 78 20 66 20 76 7A 6E 79 6A 20 78 72 66 71 71
20 70 6A 7E 78 75 66 68 6A 31 20 78 74 20 6E 79
20 78 6D 74 7A 71 69 73 2C 79 20 6D 66 7B 6A 20
79 66 70 6A 73 20 7E 74 7A 20 79 74 74 20 71 74
73 6C 20 79 74 20 69 6A 68 77 7E 75 79 20 79 6D
6E 78 20 72 6A 78 78 66 6C 6A 33 20 5C 6A 71 71
20 69 74 73 6A 31 20 7E 74 7A 77 20 78 74 71 7A
79 6E 74 73 20 6E 78 20 6C 6C 6A 73 73 6C 74 69
72 6C 6A 74 33