If you don't mind a simple cipher, you can use a string and for each character perform an ASC(), add or subtract to the number, and then CHR$(). This could, if you just shifted, by, say, 1, could turn 'hello' into 'ifmmp.' If you desire something more complicated, try creating your own ASC() and CHR$(), and create your own scrambled character set. If you want I can provide an example.