![]() The script does not directly report the URLs that it detects the user has visited it sends a deduplicated list of the interest segments associated with the visited URLs.To prevent multiple history stealing attempts in parallel, the script uses a mutex cookie.The script slows down if a URL list takes over two seconds to process.the user navigates to another page) the script sends its findings before ending execution. If history stealing is still in progress when the window is closed (e.g.The script sets a cookie indicating when it was last run it will not history steal more than once every twenty-four hours.Progress is stored in a cookie so the script can resume where it left off.The script dynamically loads lists of URLs and associated interest segments using JSONP.Links are added in an invisible iframe there is no apparent effect on the page layout.Thousands of links are tested per second. We reverse engineered the Epic Marketplace history stealing script and found a number of features: While testing the JavaScript instrumentation in our new web measurement platform we stumbled across Epic Marketplace history stealing on Flixster and. The UCSD team also discovered history stealing by several advertising networks, including Interclick (another NAI member). They found that a few popular adult sites were history stealing to learn whether users had visited their competitors. According to browser usage statistics roughly half of users remain vulnerable to history stealing.Ībout a year ago researchers at UCSD conducted the first comprehensive study of history stealing in practice. Mozilla finally implemented a fix in Firefox 4, and the other major browser vendors quickly followed. The risk goes beyond leaking individual tidbits about past browsing history stealing can be used to track or even identify a user. Members of the computer security community have long considered history stealing a serious privacy vulnerability. The approach is simple: to test whether the user has visited a link, add it to a page and check how it's styled. History stealing is a practice that exploits link styling to learn a user's web browsing history. ![]() You may recall, for example, that in the early days of the web links you hadn't visited were blue and links you had visited were purple. Many thanks once again to research assistants Akshay Jagadeesh and Jovanni Hernandez.Ī link can be styled differently based on whether you've been to the page it points to. ![]() This week we're back with a new discovery in the online advertising ecosystem: Epic Marketplace, 1 a member of the self-regulatory Network Advertising Initiative (NAI), is history stealing. Last week we reported some early results from the Stanford Security Lab's new web measurement platform on how advertising networks respond to opt outs and Do Not Track. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |