British firms have been advised to keep an eye on their WiFi.

Companies in the UK enjoying the benefits of wireless broadband have been urged to tighten up the security procedures surrounding their network by one expert, reports onrec.com.

David Hobson, managing director of IT security systems integrator Global Secure Systems (GSS), has highlighted spates of "WiFi hi-jacking" around the world, in which firms find their unsecured wireless connections targeted by users seeking to download videos and music.

"Most companies have fair usage policies written into their business broadband contracts, but many ISPs have not enforced these policies to date," said Mr Hobson.

He went on: "That situation is changing and, to prevent freeloaders running up big bills on a company's broadband account, we're advising firms to tighten up their WiFi security to prevent this happening."

Officials in India are asking RIM - the makers of the BlackBerry - to lower its encryption levels after the plotters of recent terror incidents in the country were found to have used the device to send an email prior to an attack.