Sony Corp.’s Chief Executive Howard Stringer on Tuesday described the recent PSN hack as “a hiccup”, and said that no system is cent per cent secure.

In his first public comments on the PSN attack, 69-year-old Stringer said, “This is a hiccup in the road to a network future. Nobody's system is 100 percent secure.”

Sony’s PSN and Qriocity entertainment services, which were down since April 20, a day after the Japanese company discovered a sophisticated hacking attack that left more than 100 million customers vulnerable to personal data thefts, were recently restored in some parts of Europe, America, Australia and Middle East.

The company has already admitted that the hackers stole a significant amount of customers’ personal information, including names, addresses, purchase history and credit card numbers. However, the company is yet to know who hacked the network to access the personal records.

To compensate the affected members, Sony is offering two free video games, free identity theft monitoring service for one year, a weekend of free movie rentals, 1-2 months worth of free premium PSN or Qriocity service, and in-game bonuses for a number of popular video games.

Sony aims to fully restore the PSN or Qriocity services by the end of this month.