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Sony hackers: Yet another network intrusion

Sony hackers keep coming as the company detects another intrusion. With a target on its back, what can the company to keep Sony hackers out?

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Reuters confirmed the authenticity of the data on several contestants that LulzSec said it had published.

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Cyber security is quickly rising up the agenda for global policymakers.

The Australian government said on Friday it will develop a cyber defence strategy and the United States said in a report in May that hostile acts in cyberspace would be treated just like any other threat to the country.

The hacking attack on Lockheed may have compromised the safety of SecureID tokens made by EMC Corp , while that on Google targeted, among others, senior U.S. government officials' data.

"These allegations are very serious," U.S. Secretary of States Hillary Clinton said of the Google attack, which the Internet giant said appeared to originate in China.

In the latest attack on Sony, the U.S. Federal Trade Commission could choose to review the circumstances leading up to the breach if Sony Pictures Entertainment failed to use proper procedures for protecting the data of its customers.

John Bumgarner, chief technology officer for the U.S. Cyber Consequences Unit, a nonprofit group that monitors Web threats, said he was not surprised that Sony's systems had again been breached.

"The system was unsecure," said Bumgarner, who last month warned of a string of security vulnerabilities across Sony's networks that he had identified.

He said he found vulnerabilities in the Sony Pictures Entertainment network as recently as last weekend.

The first hacking attacks in April prompted Sony to shut down its PlayStation Network and other services for close to a month.

The PlayStation games network and Qriocity, a video and music service, are back online except for some operations in Japan, South Korea and Hong Kong.

Representatives criticized Sony in the Congressional hearing for waiting several days to notify customers of the breach.

LulzSec has claimed responsibility for several hacks over the past month. It said it defaced the U.S. PBS television network's websites, and posted data stolen from its servers on Monday to protest a "Front Line" documentary about WikiLeaks.

It has also broken into a website and published data about contestants for the upcoming Fox TV talent show, "X Factor."