Sony says it has set a tentative date of May 3 for restoration of some PlayStation Network services.

“Our employees have been working day and night to restore operations as quickly as possible, and we expect to have some services up and running within a week from yesterday,” said Sony Computer Entertainment America corporate communications director Patrick Seybold in a PlayStation blog post Wednesday.

However, Sony cautioned that any date is pending the successful rebuilding of the PlayStation Network. “(We) will only restore operations when we are confident that the network is secure,” Seybold wrote.

A massive security breach last week, which has put the account information and possibly the credit card numbers of more than 70 million PlayStation Network account holders at risk, caused Sony to take down its PlayStation Network and Qriocity online services April 20.

In Wednesday’s blog post, Sony said users’ credit card data had been encrypted but that all other information was not.

“The entire credit card table was encrypted and we have no evidence that credit card data was taken. The personal data table, which is a separate data set, was not encrypted,” Seybold wrote. He said users should be aware of potential e-mail phishing scams that might use that leaked personal data.