‘Distributed guessing’ attack lets hackers verify Visa card details

Add credit card fraud to the list of things that distributed processing can speed up.
An e-commerce site will typically block a credit card number after 10 or 20 failed attempts to enter the corresponding expiry date and CVV (card verification value), making life difficult for fraudsters who don't have a full set of credentials.
But there are plenty of e-commerce sites out there, and it's possible to obtain missing account details by submitting slightly different payment requests to hundreds of