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Protecting Software License & Trial Period

Posted: Tue Mar 01, 2011 1:34 pm
by Jonah Bron
As about two of you remember, a while back I mentioned I was building a desktop application. It's basically finished now. It needs to have a 30 day trial period, and I'd like some ideas on how to protect it. I asked this same question on Stackoverflow. I still don't really know. Here's another answer on the subject: http://stackoverflow.com/questions/2021088

My main questions are "how should I encrypt the key/other data", and "where should the file be kept". My application is written in Java, but it's not really technology specific.