From: Moroni <moroni@scranton.com>
Date: Thu, 22 Feb 1996 04:54:51 +0800
To: Jens Thiel <thielj@cs.bonn.edu>
Subject: Re: Credit card numbers
In-Reply-To: <312A4F73.12A8@cs.bonn.edu>
Message-ID: <Pine.LNX.3.91.960221151336.13150A-100000@mixolydian.scranton.com>
MIME-Version: 1.0
Content-Type: text/plain


  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
> 
>