The hacker attack that crippled Sony Corp.’s PlayStation Network and Qriocity entertainment services was “a hiccup” in the company’s online strategy, Chairman and Chief Executive Officer Howard Stringer said.

“Nobody’s system is 100 percent secure,” Stringer said today in a phone interview, his first public comments on the attack. “This is a hiccup in the road to a network future.”

Stringer, 69, spoke in an interview almost a month after Sony, maker of the PlayStation console, shut down its online movie, music and games services. Hackers obtained data on more than 100 million users, the company acknowledged.

The Tokyo-based company is working to determine whether other computer systems were invaded, Stringer said. Authorities in the U.S., Europe and elsewhere haven’t provided Sony with details of criminal investigations into the attacks, he said.

Stringer has been pushing to link Sony’s televisions, mobile devices, tablets and computers via Internet connections to its movies, television shows, games and other content. The company will continue to implement that strategy, he said.

Stringer apologized on May 5 in a blog and offered U.S. users of Sony’s PlayStation Network and Qriocity services a year of free identity-theft protection, backed by a $1 million insurance policy per user covering legal and ID-restoration costs, as well as lost wages that occur after data is stolen.

The company today also offered users a package of free games and movie services as compensation.

Kazuo Hirai, Sony’s executive deputy president in charge of consumer products and network services, informed Stringer of the breach shortly before shutting down the online services.

“Kaz and I together worked out what we need to do,” Stringer said.

Sony gained 6 cents to $27.88 at 11:47 a.m. in New York Stock Exchange composite trading. The American depositary receipts had fallen 22 percent this year before today. The shares rose 34 yen to 2,275 yen in Tokyo.