What are the evercookies?
From the beginning of the Web there is strong desire to identify (track) the visitors of
a Web site. In some cases this is done for entirely legitimate purposes: easier logon (without
asking for a user name and a password), ensuring that an online voting is legitimate (by
disabling multiple votes from the same computer), providing you with personalized content
according to your previous behavior.
However, there are many not so useful and often even malicious applications of
this tracking: gathering online habits info to be sold to advertising agencies or even
to crime organizations, facilitating phishing (forging a web site interface to lure you
to enter your bank account or credit card information), marking potential victims for
building a bot-net and many more.
From privacy prospective, it is absolutely vital for you to be able to control
this tracking information (or even delete all tracking information if you want).
There are many existing means for such tracking: cookies, UserData (Internet Explorer only),
local shared objects (Flash cookies), DOM storage (local storage), HTML5 Database storage, etc.
The cookies are oldest and most used variety and therefore most browsers allow full control
over them. However the new and more obscure technologies are virtually invisible from a user
point of view and open a dangerous opportunity for malicious activity. The cleaning of cookies
from the browser controls gives the user a false sense of security.
Enter the evercookies. They are not a new way of tracking but rather
a complex and powerful way to combine all existing tracking technologies in a "super cookie",
representations are deleted.
It is obvious that the evercookies are designed to be "undeletable" and to
defy the user desire to delete all tracking information. Therefore the evercookies are
almost always used in shady and even malicious way and should not be allowed to stay on
You can use Mil Shield to delete the evercookies while keeping some of the useful
ordinary cookies (many decent and useful Web sites don't work without cookies).
Mil Shield also cleans the content of index.dat files, history, temporary Internet files and many other tracks.