Media playback is unsupported on your device

Heartbleed bug: Public urged to reset all passwords

9 April 2014 Last updated at 22:59 BST

Several technology firms are urging internet users to change all their passwords after the discovery of a major security flaw.

A bug called "Heartbleed" has been found in software used by websites to make communications secure.

Rory Cellan-Jones reports.

Copyright © 2015 BBC. 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.