Re: Prediction about new credit card number scheme

[Simon Spero <ses@tipper.oit.unc.edu>]

On Thu, 1 Feb 1996, Thomas Grant Edwards wrote:

> 
> >By JOHN MARKOFF AN FRANCISCO -- 
> >Hoping to remove a major impediment to credit card transactions over the
> >Internet, a business group led by Mastercard International and Visa
> >International plans to announce an industry-standard technology Thursday
> >for protecting the security of electronic payments. 
> 
> My prediction about the new CC standard:  it will be a mistake if they 
> don't pass on the details to cypherpunks.
> 
> BTW - are any micropayment schemes reving up to commerciality yet???
> 
> -Thomas
> 
> 
> 
> 
> 

(defun modexpt (x y n)  "computes (x^y) mod n"
  (cond ((= y 0) 1) 
	((= y 1) (mod x n))
	((evenp y) (mod (expt (modexpt x (/ y 2) n) 2) n))
	(t (mod (* x (modexpt x (1- y) n)) n))))