May 15, 2011, 2: 15 AM EDT by Mariko Yasu

(Updates with details about the phased recovery, starting in the fifth subparagraph.)

May 15 (Bloomberg)--Sony Corp. has resumed partial operation of its PlayStation Network and Qriocity entertainment in the US and Europe after more than three weeks, the company said in a statement e-mailed to Bloomberg News. Restored activities include online gamingchat service, and music downloads. Sony plan to restart the service in Asia quickly, it said in the statement.The Tokyo-based maker of PlayStation game consoles suspended services on 20 April after an attack by hackers. The intrusion led to a violation of data on more than 100 million users, the second-biggest online theft of personal information. Frustration puffed under players of online games after Sony not to deliver on a 1 may promise that the network back in operation within a week.Sony security for PlayStation Network and Qriocity stimulated by increasing the number of firewalls between servers and software to control intrusions and system vulnerabilities to add, it said. The company also appointed Fumiaki Sakai the newly created position of chief information security officer, it said.The network is restored in stages by region, and some American States are still without services, Sony said. It takes probably "a little more time" to enable rural services and information about planning the roll-out will be updated on the PlayStation blog, the company said.ChangePhased password recovery is also started in South America, the Middle East, New Zealand and Australia, according to Satoshi Fukuoka, a spokesman for Tokyo-based. Users must change their passwords and update by a compulsory system, he said.Also resumed Sony Online Entertainment, the San Diego-based unit games played on personal computers, offer some services, said Sony today.Sony said it plans to full operation of online services including purchases of games and video content by the end of May.Amazon.com Inc's Web Services, cloud computing unit was used by hackers in the attack last month against Sony Corp's online entertainment systems to restore, according to a person with knowledge of the matter.Hacker Alias Hackers signed using an alias to rent a server via Amazon's EC2 service and launched the attack from there, said the person, who asked anonymity because the information is confidential. The account is closed, said the person.Drew Herdener, a spokesman for Seattle-based Amazon, declined to comment. Amazon has not responded to a request to speak with CEO Jeff Bezos. Amazon's Cloud safety is our top priority, said Bezos at an event sponsored by Consumer Reports magazine last week.Sony offers customers a free year of identify-theft protection after the attack. Thieves have stolen credit card, debit records and other personal information of customers of Sony Online Entertainment, a third service. The New York Attorney General's office has Sony, according to a person familiar with the probe.Security breaches invasions CostNetwork are part of a trend that saw the cost of such invasions jumping 48 percent, to an average of $ 318 per compromised record last year, according to a report in March by the Ponemon Institute. Malicious attacks in the us are on the rise. They climbed 7 percent points in 2010, with data breaches costing u.s. businesses an average of 7.2 million dollars per incident, according to the Ponemon Institute report. The study found that about 85 percent of all u.s. companies have experienced one or more attacks.The use of a hijacked or rented server to launch attacks is typical of advanced hackers. The proliferation of server farms all over the world has facilitated such misdirection, said E.J. Hilbert, President of the security company Online intelligence and a former FBI cyber-crime researcher.

--Editors: Jim McDonald, Jane, Shen Ching Lee

#<316508.689092.2.1.87.23378.25>#-0-May/15/2011 05: 52 GMT

Contact the reporter on this story: Mariko Yasu in Tokyo at myasu@bloomberg.net

Contact the editor responsible for this story: Paul Tighe on ptighe@bloomberg.net

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