Last updated: 9 december, 2010 - 17:44 GMT

Wikileaks: Have hackers triggered a cyber war?

Mastercard and Visa logos on a window

Mastercard acknowledged there had been 'a service disruption'

After hackers temporarily shut down the websites of the one of world's biggest credit card companies, Mastercard, there is growing concern about the spreading cyber war of attacks and counter-attacks.

The Operation Payback campaign is targetting firms that have withdrawn services from Wikileaks, the whistle-blowing website which has been publishing leaked secret cables from US diplomats.

The hackers' top targets have included websites run by the financial groups MasterCard, Visa and PayPal.

Jeff Jarvis is a technology journalist in New York.

To play this content JavaScript must be turned on and the latest Flash player installed.

Play in either Real OR Windows Media players

First broadcast 9 December 2010

related bbc links

Most Popular Now

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.