Cracking Apps Gromit! by Mark Danks
 

A developer's thoughts on cracked copies of his application.

https://vimeo.com/124328842

So, the programmer is also doing some code reversal - interesting.

Sadly he recommending plenty of usefull things, like not putting the autorization code all in one place. That would force cracker to looking in debudger, where the program is going and therefore make cracking harder.

Also, checking own executable for own signature forbid users to make usefull changes in the program, so again this is what I'm deeply against it.

And the constant internet checkings is awfull and should not be done - apps should run w/o internet, after all!