Washington: Facing escalating risks of cyber attacks, the US is all set to unveil a strategy for protecting its computer systems that goes beyond erecting firewalls.

The new cyber strategy from the Pentagon comes in the wake of the increasing attacks on its computers and cyber networks, mainly from overseas. The country spends millions of dollars every year for its security.

The Department of Defence (DoD) operates over 15,000 networks and seven million computing devices across hundreds of installations in dozens of countries across the globe.

The five strategic initiatives announced by the Pentagon on Thursday include -- treat cyberspace as an operational domain to organize, train and equip so that DoD can take full advantage of cyberspace's potential; employ new defence operations concept to protect DoD network and systems; and partner with other US government departments, agencies and the private sector to enable a whole-of-government security strategy.

It also calls for building robust relationship with US allies and international partners to strengthen collective cyber security and leveraging the nation’s ingenuity through an exceptional cyber workforce and rapid technological innovation.

"The Department's five strategic initiatives offer a road map for DoD to operate effectively in cyberspace, defend national interest and achieve national security objectives," said the 13-page unclassified version of the strategy released on Thursday.

Noting that foreign cyberspace operations against US public and private sector systems are increasing in number and sophistication, the strategy said DoD networks are probed millions of times every day and successful penetration have led to the loss of thousands of files from US networks and those of US allies and industry partners.

As malicious cyber activity continues to grow, the Pentagon has employed active cyber defence to prevent intrusions and defeat adversary activities on its networks and systems, the strategy said.