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A new type of online identification are reportedly being developed by spammers that can identify surfers based on innocuous data about their browser, such as plug-ins, system fonts, and their operating system. This method of identification can create a person’s unique digital fingerprint from a combination of data that separately appear harmless, and it can be used to track you without any form of cookies.

It’s like describing a person. Just saying “brown hair” won’t identify anyone. But add in “5 feet, 10 inches tall,” “chipped right front tooth,” “size 12 shoes,” and so on, and soon you have enough information to pull someone out of a crowd, even without their name, Social Security number, or any other of the usual identifiers.

Test your browser for unique identifiers without the risk: The Electronic Frontier Foundation, a privacy advocacy group, has set up an interesting online experiment at Panopticlick.eff.org. Panopticlick gathers little de­­tails about your browser and computer, mostly using Javascript. In my case, the information it gathered about my browser was enough to uniquely identify my surfing software out of more than 650,000 visitors.
More Than a Rumor

Peter Eckersley, a staff technologist with the EFF, says he and his colleagues de­­cided to create the site when he heard rumors about this kind of tracking. He wanted to see how accurate it might be.

Well, it’s pretty accurate. And as it turns out, its use is more than a rumor.

Browser fingerprinting was developed for banks to employ to prevent fraud. But now one company, Scout Analytics, offers it as a service to Web sites, and it collects not just browser data but also data about how you type–things like your typing speed and typing patterns.

This biometric signature, like the identifiers collected from the browser and the computer, can be gathered using JavaScript alone, making this form of tracking hard to block. Matt Shanahan, senior vice president of strategy at Scout Analytics, says that the company sells its service primarily to paid subscription sites, such as those offering real estate listings, and that it is keen to expand into marketing and advertising by helping sites track visitors in a way that, as he notes, is more accurate than using cookies. (Cookies can be deleted, which makes a repeat visit look like a new person to the site.)

Short of in-depth analysis of a given page, browser fingerprinting doesn’t leave tracks, so it’s hard to pinpoint sites that use it. But clear­­ly advertisers want accurate tracking.
Is It Legal?

Can sites legally use this fingerprinting? Existing guidelines from the Network Advertising Initiative, an online advertiser group focused on industry self-regulation, wouldn’t al­­low it if a target had opted out of it for use in behavioral advertising, according to Ari Schwartz, deputy director of the Center for Democracy and Technology.

But hard-set rules vary among business sectors and states. Because of this and other variables, its legality remains fuzzy. Schwartz adds that, hypothetically, a site could be in the clear if the practice was disclosed in those long privacy policies that nobody reads.

And countering the technique can be problematic. The EFF lists some options, but none are as simple and painless as deleting a cookie.
In the arms race between online ad­­vertisers and Web surfers, this new technology could be a pretty big gun.

Source: PC World.


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  1. Your Browser’s Fingerprint Can Give Up Your Online Identity | AboutBrowsers.info Says:

    […] Read more from the original source: Your Browser’s Fingerprint Can Give Up Your Online Identity […]

    Posted on March 28th, 2010 at 8:39 AM

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