Sony chief Howard Stringer, has warned that it could no longer guarantee the safety of the electronics giant of online gaming, “a new world of bad” cyber-crime, after one of the largest data theft on the Internet.

Japanese multinational company has begun to restore the hacked PlayStation Network, Sony Online Entertainment and services after the theft of personal data in more than 100 million accounts, cyber-attack against the company estimates that the cost of one billion U.S. dollars.

The company has confirmed the safety, but Stringer, speaking for the first time, said Tuesday that the crisis to protect private information “never-ending process,” and he did not know if anyone could be “100 percent sure.”

Sony PlayStation Network and close the music streaming service Qriocity April 20 from its data center in San Diego has been hacked – but did not disclose the breach until 26 April.

The company said it is possible that millions of credit card numbers may have been compromised.

Stringer, 69, warned that hackers could eventually target the global financial system, grid systems or air traffic control.

“It ‘s the beginning, unfortunately, or the shape of things to come,” he told Dow Jones Newswires. “There is a new world – is an ugly new world.”

Violation is a huge blow to Sony, it focuses on content including driving games and music via mobile platforms, such as game consoles, smart phones and tablet PCs in the midst of competition from Apple’s iTunes and App Store.

Sony has been battered by bitter criticism of the crisis that has overshadowed the achievements of the company rebound after two years of losses.

Stringer has hit back at politicians and privacy on the Internet said he supports Sony should have informed subscribers of the potential threat of data theft in the past.

He said Sony did not know definitively until April 25 that personal data has been read, and added that he said, speaking publicly doubts the company about the evidence before it would be “irresponsible.”

“We tried to find in a very volatile situation that had happened and when we did we passed,” said Stringer. “If your house was broken into, you know you’ve lost something before calling police, he said.

Stringer said the investigation by the Federal Bureau of Investigation of the matter was still ongoing, but declined to provide updated information on the results.

The Executive Director said it was too early to assess the economic impact of abandonment, with the company to report full-year results, May 26, but analysts said the break costs society as much as $1 billion.