Sony Breach Fuels Enterprise E-Mail Fears

You're welcome to dance like there's nobody watching. But you'd better write emails like your email provider is going to be hacked. The Internet-era twist on the old maxim is the lesson that technology entrepreneur Greg Isenberg learned from the cyberattack that ravaged Sony Pictures Entertainment's computer network last month, sending thousands of sensitive email exchanges into the public domain as the studio, under threat, fretted over whether to release "The Interview."

Isenberg, who runs a popular video-watching app called 5by, lost control of his email account in June after a fraudulent message lured him to a malicious website resembling YouTube. The hacker reset Isenberg's PayPal password, drained his account and found his Social Security number in another email. Immediately after, Isenberg changed his passwords and turned on two-step authentication so someone would need to know his password and have his smartphone to log into his accounts.

The Sony breach spooked him again, though. He toughened up each of his key passwords to a Ft. Knox standard this time around, said Isenberg, a self-described "double-neurotic."

"I felt so burned in June and then sad with what happened to Sony," he said. "We take for granted that our data is all secure. It reminded us all that we're all subject to this."

The public airing of Sony's dirty email laundry -- along with nearly 50,000 Social Security numbers, salary information and movies still under wraps -- lifted paranoia about security across the business world.

Frank Mong, general manager of enterprise security solutions at Hewlett-Packard Co., called the breach a watershed moment: Sensitive Sony files being held hostage by hackers represent a new threat.

"That is concerning not just for the movie industry but for all industries within the U.S. economy or world economy," he said.

Cybersecurity experts say most companies will wait a couple of months for the...

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