Thread: how are copy protections implemented?

hi,

i'm developing for the series 60 platform(ie symbian os), the cellphones have this IMEI number, which is unique on all cellphones,

i was wondering how exatly copy protections are implemented? for example the IMEI number of the phone is 1111222233334444 (though the IMEI is 15 digis only i think),

do i like, if 1 then reg key will be 'a', if 2 then next reg key is 'b' and so on..,

any clues? sample implementations or links...

is it really upto me how i implemented my algorithm for the copy protection?

many thanks,