Peter, I'm looking for something to generate license codes for some software I'm planning to sell. Do you think this would work for that purpose? Pete Molly's Revenge <http://www.mollysrevenge.com>
On Sat, Apr 2, 2011 at 9:51 AM, Peter Brigham MD <pmb...@gmail.com> wrote: > For anyone who might have the need, I have a handler I use to generate a > security code, in my case for printed prescriptions. It takes the name of > the patient, the date of the prescription, the medication and med strength > and hashes all that to produce a ten-digit alphanumeric string (using 0-9, > a-z, A-Z). If there is any question about the validity of the prescription I > can retrieve the correct code from the rx entry in my database with a > mouseclick (actually recalculating the code from the stored rx data) and > confirm it with the pharmacy. This has proved useful on two occasions when a > pt was playing fast and loose with his prescriptions. > > The algorithm is fast in LC, sufficiently obscure that I'm pretty sure it > would be hard to hack -- though of course few things are bulletproof in > encryption if someone wants to try hard enough -- and discontinuous in the > sense that similar inputs do not generate similar outputs, eg, change one > character in the input and the code number is completely different. The > probability of coming up with the correct security number by chance alone is > 1 in 10^15 (a million billion to 1). It could be adapted to any number of > purposes. I am not posting the handler here, since it would be unwise to let > it be archived and available, eg, with a Nabble search, but if anyone is > interested, let me know and I'll share it. > > -- Peter > > Peter M. Brigham > pmb...@gmail.com > http://home.comcast.net/~**pmbrig <http://home.comcast.net/~pmbrig> > > > ______________________________**_________________ > use-livecode mailing list > use-livecode@lists.runrev.com > Please visit this url to subscribe, unsubscribe and manage your > subscription preferences: > http://lists.runrev.com/**mailman/listinfo/use-livecode<http://lists.runrev.com/mailman/listinfo/use-livecode> > > _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
