You Deleted Your Cookies? Think Again | Wired Business. More than half of the internet’s top websites use a little known capability of Adobe’s Flash plug-in to track users and store information about them, but only four of them mention the so-called Flash cookies in their privacy policies, UC Berkeley researchers reported Monday. Unlike traditional browser cookies, Flash cookies are relatively unknown to web users, and they are not controlled through the cookie privacy controls in a browser.
That means even if a user thinks they have cleared their computer of tracking objects, they most likely have not. What’s even sneakier? Several services even use the surreptitious data storage to reinstate traditional cookies that a user deleted, which is called ‘re-spawning’ in homage to video games where zombies come back to life even after being “killed,” the report found. So even if a user gets rid of a website’s tracking cookie, that cookie’s unique ID will be assigned back to a new cookie again using the Flash data as the “backup.”
Tools: See Also: Local shared object. Local shared objects (LSOs), commonly called Flash cookies (due to their similarities with HTTP cookies), are pieces of data that websites which use Adobe Flash may store on a user's computer. Local shared objects have been used by all versions of Flash Player (developed by Macromedia, which was later acquired by Adobe Systems) since version 6.[1] Flash cookies, which can be stored or retrieved whenever a user accesses a page containing a Flash application, are a form of local storage. Similar to that of cookies, they can be used to store user preferences, save data from flash games, or to track users' Internet activity.[2] LSOs have been criticised as a breach of browser security, but there are browser settings and addons to limit the duration of their storage.
Storage[edit] Local shared objects contain data stored by individual websites. With the default settings, the Flash Player does not seek the user's permission to store local shared objects on the hard disk. Privacy concerns[edit] New Breed of Super Cookie Defies Removal – Almost… | Fight Identity Theft. From a recent UC Berkeley report: More than half of the internet’s top web sites use a little known capability of Adobe’s Flash plug-in to track users and store information about them, but only four of them mention the so-called Flash Cookies in their privacy policies. Under the direction of Chris Hoofnagle of the Information Privacy Programs at the Berkeley Center for Law and Technology, the researchers discovered that most web users aren’t familiar with Flash cookies and that Flash web cookies can’t be controlled through the cookie privacy controls in a browser. Even more interesting was the use of Flash cookies to ‘re-spawn’ or bring back to life traditional browser cookies that had been deleted on customer computers.
In the study even several federal government web sites were found to contain Flash cookie ID information. The federal government has a policy of banning the use of traditional browser cookies. What’s all the fuss about? Changing Flash Preferences Flash Cookie Removal Tools. Settings Manager - Website Storage Settings panel. Note: The Settings Manager that you see above is not an image; it is the actual Settings Manager. Click the tabs to see different panels, and click the options in the panels to change your Adobe Flash Player settings. The list of websites above is stored on your computer only, so that you can view or change your local storage settings.
Adobe has no access to this list, or to any of the information that the websites may have stored on your computer. Use this panel to specify storage settings for any or all of the websites that you have visited. The name of the website The amount of disk space the website has used to store information on your computer The maximum amount of disk space the website can use before requesting additional space In this panel, you can change storage settings for a website or delete the website so that, if you visit it again, it will use your global settings instead of any individual settings you may have set.
Change storage settings Delete website Delete all sites. Top websites using Flash cookies to track user behavior - Risk.