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Posts Tagged ‘browser cookies’

Un-killable ‘Evercookie’ Killed … Sometimes

October 19th, 2010 10:36 admin View Comments

Trailrunner7 writes “The persistent method that security researcher Samy Kamkar introduced last week for storing tracking data on a user’s machine, known as the ‘Evercookie,’ is even more worrisome when used on mobile devices, according to another researcher’s analysis. The Evercookie is a simple method for forcing a user’s machine to retain browser cookies by storing the data in a number of different locations. The method also has the ability to recreate deleted cookies if it finds that the user has removed them. Created by Kamkar as a demonstration of a way that sites could use to persistently track users even after they clear their browser cookies, the Evercookie has drawn the attention of a number of other researchers who have spent some time looking for methods to defeat it. A researcher in South Africa took a look at the way the the Evercookie works on both Safari on the desktop and on mobile devices, and found that it can be undone in some circumstances. However, he also found that the mobile version of Safari fares far worse in its handling of the Evercookie than the standard version does.”

Source: Un-killable ‘Evercookie’ Killed … Sometimes

Retargeting Ads Stalk You For Weeks After You Shop

August 30th, 2010 08:36 admin View Comments

eldavojohn writes “The New York Times is reporting on a new kind of web ad that takes products you were looking at purchasing on one site and continually advertising them in front of you at subsequent sites. After looking at shoes at Zappos, a mother in Montreal noticed the shoes followed her: ‘For days or weeks, every site I went to seemed to be showing me ads for those shoes. It is a pretty clever marketing tool. But it’s a little creepy, especially if you don’t know what’s going on.’ The spreading ploy is called ‘retargeting ads’ and really are just a good demonstration of how an old technology (all they use are leftover browser cookies) are truly invasive and privacy violating. Opponents are clamoring for government regulation to protect the consumer and one writer mentioned a consumer ‘do not track’ list — adding that retailers really show little fear of turning off customers with their invasion.”

Source: Retargeting Ads Stalk You For Weeks After You Shop

Lawsuit Hits Companies Using ‘Zombie’ Flash Cookies

July 27th, 2010 07:43 admin View Comments

A privacy activist has filed a lawsuit targeting eight corporate users of Quantcast’s “zombie” Flash cookies, in addition to Quantcast itself. The suit alleges that MTV, ESPN, MySpace, Hulu, ABC, Scribd, and others used Quancast’s Flash-based cookies to recreate browser tracking cookies that users had taken the trouble to delete. “At issue is technology from Quantcast, also targeted in the lawsuit. Quantcast created Flash cookies that track users across the web, and used them to re-create traditional browser cookies that users deleted from their computers. These ‘zombie’ cookies came to light last year, after researchers at UC Berkeley documented deleted browser cookies returning to life. Quantcast quickly fixed the issue, calling it an unintended consequence of trying to measure web traffic accurately. … The lawsuit (PDF)… asks the court to find that the practice violated eavesdropping and hacking laws, and that the practice of secretly tracking users also violated state and federal fair trade laws. The lawsuit alleges a ‘pattern of covert online surveillance’ and seeks status as a class action lawsuit.”

Source: Lawsuit Hits Companies Using ‘Zombie’ Flash Cookies