Is it legal to use Firesheep at Starbucks?

Legal experts debate legality of Firefox add-on that steals Facebook, Twitter account access at public hot spots

People using the Firesheep add-on may be breaking federal wiretapping laws, legal experts said today.

Or maybe not.

"I honestly don't know the answer," said Phil Malone, a clinical professor of law at Harvard Law School as well as the director of the school's Cyberlaw Clinic at the Berkman Center for Internet and Society. Malone also served for more than 20 years as a federal prosecutor with the U.S. Department of Justice.

Firesheep, which was released just over a week ago and has been downloaded nearly half a million times since, is an add-on to Mozilla's Firefox browser that identifies users on an open network -- such as a coffee shop's public Wi-Fi hot spot -- who are visiting an unsecured Web site.

A double-click in Firesheep gives its handler instant access to the accounts of others accessing Twitter and Facebook, among numerous other popular Web destinations.

But while the tool itself is not illegal, using it may be a violation of federal wiretapping laws and an invasion of privacy, experts said.

"There are two schools of thought," said Jonathan Gordon, a partner in the Los Angeles office of law firm Alston & Bird. "The first is that there's no reasonable expectation of privacy in a public insecure Wi-Fi connection."

Gordon, who regularly counsels clients on their Internet business practices, cited the U.S. statute pertaining to wiretapping, which states that it's not a violation of the law "to intercept or access an electronic communication made through an electronic communication system that is configured so that such electronic communication is readily accessible to the general public."

But a second school of thought, said Gordon, "is that when people are accessing their social network [account], they have an expectation that whatever they're doing is governed by the privacy settings in that network." In other words, the fact that accessing a site takes place in an unsecure environment is beside the point.

Gordon acknowledged that the second position was held by a minority of legal experts.

Scott Christie, a partner in the Newark, N.J., office of law firm of McCarter & English, is in that minority, and he said that using tools such as Firesheep -- dubbed "packet-sniffers" -- is illegal.

"Do people have a reasonable expectation of privacy when they're at a public node? The answer is probably yes," said Christie. "They don't forfeit their expectation of privacy simply by using a public Wi-Fi spot. And wiretap laws in general make it illegal to intercept real-time communications and content."

But privacy laws were not crafted to cover scenarios where the owner of the data -- in the Firesheep example, people accessing their Facebook accounts at an unsecured hot spot -- didn't take steps to protect their information.

That's one of the reasons why the legality of Firesheep, and other tools like it, remains up in the air.

"It's an unsettled legal issue, but it will be tested at some point," Christie said. "Like many other situations, this is one of those areas where the law was crafted prior to the Internet age, and the courts will have to catch up."

Gordon agreed. "It may be difficult [to clarify this], but it will happen," he said.

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