For your implementation, im guessing that wat u wana do, wat language are u looking at using to implement this? maybe i can point u in a direction i would use. On Mon, Jul 12, 2010 at 6:29 PM, Paul Roy <roykoikai@gmail.com> wrote:

Peter this is fishy question.... however to satisfy your curiosity - They use a trick in computer science called Uniform Random Distribution. The concept assumes that if you pick a billion numbers and randomly pick 100,000 or so unique numbers then the probability that someone will guess is almost impossible. - They never use pure random numbers (which is impossible to generate anyway) but use uniform random which means that I can not get the same numbers as the previous numbers. As the space gets depleted they move to next billion space. This goes on and so forth etc

Becasue of depletion of space, that is why your card must be used within a certain period.

regards, Paul.

On Mon, Jul 12, 2010 at 6:00 PM, Peter Muchemi <pmuchemi@gmail.com> wrote:

...

Hi,

Any one with info on how scratch cards numbers are generated. Like for safcom? To prevent hacking, reverse engineering. _______________________________________________ Skunkworks mailing list Skunkworks@lists.my.co.ke http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks ------------ Skunkworks Server donations spreadsheet

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-- "Change is slow and gradual. It requires hardwork, a bit of luck, a fair amount of self-sacrifice and a lot of patience."

Roy.

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I had the opportunity to generate some voucher numbers that included random number generation and some mathematical formulas. Sorry I don't have the code but it was done in PHP. -- Many Thanks. Regards, Clement Ongera.

Omera "- They never use pure random numbers (which is impossible to generate anyway" http://en.wikipedia.org/wiki/Entropy_pool ? From: Paul Roy [mailto:roykoikai@gmail.com] Sent: 12 July 2010 5:29 p To: Skunkworks Mailing List Subject: Re: [Skunkworks] scratch cards generating algorithm Peter this is fishy question.... however to satisfy your curiosity - They use a trick in computer science called Uniform Random Distribution. The concept assumes that if you pick a billion numbers and randomly pick 100,000 or so unique numbers then the probability that someone will guess is almost impossible. - They never use pure random numbers (which is impossible to generate anyway) but use uniform random which means that I can not get the same numbers as the previous numbers. As the space gets depleted they move to next billion space. This goes on and so forth etc Becasue of depletion of space, that is why your card must be used within a certain period. regards, Paul. On Mon, Jul 12, 2010 at 6:00 PM, Peter Muchemi <pmuchemi@gmail.com> wrote: Hi, Any one with info on how scratch cards numbers are generated. Like for safcom? To prevent hacking, reverse engineering. _______________________________________________ Skunkworks mailing list Skunkworks@lists.my.co.ke http://lists.my.co.ke/cgi-bin/mailman/listinfo/skunkworks ------------ Skunkworks Server donations spreadsheet http://spreadsheets.google.com/ccc?key=0AopdHkqSqKL-dHlQVTMxU1VBdU1BSWJxdy1f bjAwOUE <http://spreadsheets.google.com/ccc?key=0AopdHkqSqKL-dHlQVTMxU1VBdU1BSWJxdy1 fbjAwOUE&hl=en> &hl=en ------------ Skunkworks Rules http://my.co.ke/phpbb/viewtopic.php?f=24 <http://my.co.ke/phpbb/viewtopic.php?f=24&t=94> &t=94 ------------ Other services @ http://my.co.ke <http://my.co.ke/> -- "Change is slow and gradual. It requires hardwork, a bit of luck, a fair amount of self-sacrifice and a lot of patience." Roy.