Super cookies are not like standard cookies. They can hold information, anything from login details to data about how the visitor arrived at a website, the links they visited inside the website and which other websites they visit. While a normal cookie takes as little as 4KB for storing data, the super cookies takes as much as 100KB for storing the data.
The presence of these super cookies was recently discovered by some security researchers at Stanford University. The presence of super cookies was noticed first in MSN websites. This has raised serious questions about the privacy of customers visiting these sites. This has also raised concern regarding the advertising practices followed by Microsoft. Microsoft can use this information for passing on the details to other advertisers.
Features of Super cookies
These super cookies are difficult to remove unlike the normal cookies. These cookies are also not browser dependent. The super cookies once downloaded inside the computer, gets stored in a folder which is not browser related. Usually it is downloaded on shared add-on folders such as flash player. This enables them to get loaded in other browsers if the add-on is shared by other browsers. So it doesn’t make any difference if you are using IE, Mozilla, chrome or safari browsers.
Currently there are no laws in US or EU to stop the usage of super cookies. But good news is that Microsoft has agreed to stop the usage of super cookies in their websites immediately. The company insists that they never used this collected information and shared with their advertisers. Surely, Microsoft is not interested in creating anymore controversies.