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TOKYO—Sony Corp. said it is unable to say when it can restore partial service to its PlayStation Network online game system, likely adding to pressure from already frustrated customers who have been subjected to stolen personal data as well as missed deadlines for resumption.
The electronics company stuck with its earlier goal of fully restoring the service by the end of the month. But the company said Tuesday that it does not yet have any new deadline for partial resumption, after missing an earlier deadline. Sony said May 1 it aimed to resume some of the PlayStation Network and Qriocity online services within a week.
"We are making doubly sure that our systems are secure before restarting them," said Satoshi Fukuoka, a spokesman for Sony Computer Entertainment Inc.
Sony also confirmed Tuesday that hackers probably stole personal information from another online service run by its San Diego-based unit, Sony Online Entertainment, which makes multiplayer games for personal computers. As hackers had access to the information "we have to assume that it has been stolen," Mr. Fukuoka said.
In a May 3 announcement disclosing hackers had gained access to that service, Sony stopped short of confirming a theft, saying the data "may have been stolen."
The hackers gaining access to personal data on 24.6 million customer accounts in that break-in, bringing the total confirmed number of accounts that details have been stolen from to more than 100 million.
Sony said it is taking extra care as it prepares to restart the services to make sure no more security problems occur. Sony said the delay is due partly to the additional data breach, which it found after it set its initial deadline on May 1.