> I also encode date of issue into the key. If the key isn't used to authorize > the software within three days of issue, it won't be accepted.
I can see the point, but how do handle it when a user wants to register the software on a different / new computer? Issuing new serials by hand would be unpractical as soon as your userbase grows beyond a few thousand and having that automated kind of defeats the purpose. (Maybe automated, but limited to one or two per year a bit like iTunes?) Regards, Martin HairerSoft http://www.hairersoft.com/
