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Page last updated at 09:28 GMT, Wednesday, 8 June 2011 10:28 UK

Kazuo Hirai: Sony 'may never know' what hackers stole

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Around 100 million PlayStation users had their account details stolen earlier this year when the network was hacked.

Intruders into the PlayStation network were very good at hiding their tracks, admits Sony Executive Deputy President Kazuo Hirai.

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