You might like to look at the way I obscure the password and key in Tk Virtual Keyboard Example. One is CBC-blowfish encrypted, then base64encoded so it can be included in the script. Another thing is to put your password as a series of hex numbers, then combine them when needed.

Of course, any decent programmer will be able to get the keys out, but a casual office worker will be stymied. And you can remove the Tk stuff and run it from a commandline. The subs that do the obscuring/deobscuring are included.