‘Prepare for all-out cyber war’

Whitehall is preparing for a crippling attack on government websites as evidence mounts that the backlash against the arrest of the WikiLeaks founder Julian Assange is rapidly growing into a mass movement that aims to cause widespread disruption on the internet.

Extra security measures have been added to a host of government web services, in particular those used to claim benefits or provide tax information, after Sir Peter Ricketts, the national security adviser, warned permanent secretaries across all departments that “hacktivists” who last week targeted the sites of companies such as MasterCard and PayPal could switch their focus to Britain.