The government has warned that the UK is likely to come under attack by cyber criminals during the London Olympics this summer.
In a speech in Estonia, Cabinet Office minister Francis Maude said UK government computers are regularly targeted by foreign intelligence agencies or groups working on their behalf.
He said the government's objective was to make the UK more resilient to such types of attacks.
"This year's Olympics in the United Kingdom will not be immune to cyber attacks by those who would seek to disrupt the Games," he said.
"The Beijing Olympics saw 12 million cyber security incidents during their Olympics. We have rightly been preparing for some time - a dedicated unit will help guard the London Olympics against cyber attack - we are determined to have a safe and secure Games."
Maude referred to the £650m of funding the government has put aside to tighten its security for cyber attacks during the next four years, and the transformative national cyber security programme it has established.
The cyber security programme has paid for the expansion of the Serious Organised Crime Agency, he said, as well as the launch of a dedicated Crack Cyber Team at HMRC, which funds the recruitment of technical experts, analysts and investigators to protect the department's customers.
The minister said all the UK government departments must continue to work together to tackle cybercrime, along with help from the private sector.
"Much of the infrastructure we need to protect in the UK is owned and operated by the private sector," said Maude.
"There needs to be more alerting and greater awareness of attacks - with private organisations working in partnership with each other, Government and law enforcement agencies; sharing information and resources so we can build up a better picture of the threats we're facing and collectively fight a common challenge."
Maude said a joint public and private sector cyber security ‘hub' had recently been set up with five business sectors - defence, telecoms, finance, pharmaceuticals and energy - to allow the government to exchange actionable information with the private sector on cyber threats.
But he warned cyber threats are continuing to accelerate.
"High-end cyber security solutions that were used 18 months ago by a limited number of organisations to protect their networks may already be out in the open marketplace - giving cyber criminals the knowledge to get round these protective measures."
"Our responses have to be fast and flexible. What works one day is unlikely to work a matter of months or even weeks later."
Atos Origin, the firm tasked with leading the IT systems in use at the Games, has already completed phase one of its testing ahead of the event.
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