On 2 Jan 2010, at 01:51, Benjamin Rister wrote:
> > Under a standard serial scheme, following a keygen you have no choice but to > change algorithms and invalidate all existing licenses, full stop. Who you > choose to issue new licenses to is a separate matter, and I can’t think of > any possible way to do this without inconveniencing and annoying your > legitimate users. We just went through this in 2009. We were using a symmetrical algorithm. Moreover, it was they Kagi generic algorithm, so it's even open (except parameters). And so we had a KeyGen released in the beginning in 2009 and I had to implement another algorithm. I used CocoaFob and also created an autoupdate procedure for existing users (the client connects to server, passes old key and receives a new one). The server also sends an email to the customer with the new key upon the update. It worked quite well, in general. Jacob Gorban ([email protected]) Twitter: apparentsoft http://www.apparentsoft.com ------------------------------------ MacSB email guidelines: http://tinyurl.com/2g55d6 Use MacSB-Talk for off topic messages: http://groups.google.com/group/macsb-talk Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/macsb/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/macsb/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
