The consumer electronics giant has attracted heavy criticism after announcing the two major data breaches, with Sen. Richard Blumenthal (D., Conn.), in particular, slamming the company's inability to protect customer data.

On Wednesday Sony told TheStreet that it is working with data forensics specialist Guidance Software ( GUID) to catch the hackers that breached its PlayStation Network, as well as privately-held Data Forté. The company is also working with business consultancy Protiviti, a subsidiary of Robert Half International ( RHI), to clean up after the attack, it said.

Sony, which is working closely with the FBI to find out how its systems were compromised, said it is also rethinking its security strategy. In his letter to the House Energy and Commerce Committee, Hirai outlined a number of measures to prevent future breaches. These include automated software monitoring and configuration management, enhanced levels of encryption and additional firewalls.

Sony is also speeding up the move of its PlayStation Network system to a new data center in a different location, according to Hirai, who says that this will offer enhanced security.

The company will also be naming a new Chief Information Security Officer who will report directly to the company's Chief Information Officer, he said.

Sony shares were down 26 cents, or 0.92%, to $28.12 on Thursday.

--Written by James Rogers in New York.

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