finding a unique string

[dkaip]

Hello.
I want to make a program that runs in linux and windows, finding a unique string because of disk, encrypt and store it in a hidden part of the disc, so I can sell my program without the risk of theft. Any idea of codes?

Thank's
Jim

[haglerchristopher]

Not sure what you mean by "because of disk". If you are just learning how to program, I would recommend starting with just writing the string to a file and then using some library to encrypt the file. You can then set the permissions on the file to make sure it is hidden. A simple google search of "how to write to a file in x programing language" should give plenty of results.

[dkaip]

I mean the following. Opening the program examines the hard drive c: and from the serial number sent an encrypted password, and then saves it to a party operating in a way that can not be broken and be detected.