Hi guys, Long time no post. Credit card numbers are determined by algorithmns.If s credit card number is no fitting to that algorithmn it is phoney. The only way that I know of to determine the validity of the card if a person has a copy of underground algorithmn generating software is to use the voice number and a store acct # for a purchase of say $50.00 or to go through the credit bureau.What I have wondered is if there is a way to determine a experation date from the credit card number. Bye moroni On Tue, 20 Feb 1996, Jens Thiel wrote:
Is there something like a checksum attached to Credit Card Numbers. Or better: Is there a way to determine for a given number N if -this _might_ be a valid number -this can't be a valid number
Thanx, Jens. -- mailto:thielj@cs.bonn.edu Fax: +49 228 747246 http://www.Bonn.CityNet.DE/people/jens