gue.schmidt:

Hi all,

my haskell app is getting closer to shipping and what I need to do now is to give product protection some thought. The product is for hospitals and therefore a very limited set of clients. I do not expect anyone to try to "hack" my application but I need a basic protection mechanism in place, if only to check for a valid license key.

Congratulations!

As I've never done this before I'd be grateful for some suggestions here.

Some versions of Cryptol have private key signing / license checking component, built into the application, which checks the software was properly licensed. Essentially: grab some public key crypto, sign it with your company's key, and check the signature on startup. -- Don