Why should I use xID instead of my username and password?
Many people find it difficult to keep track of all the usernames and passwords they use to log in to different websites. With xID, you don’t need a username and password to log in. On websites where you choose to use xID, you log in with a single keystroke.
Many people use the same username and password on more than one website, or keep all their passwords in one place. If anyone were to get hold of one of your passwords, they may also gain access to your profile on different websites by pretending to be you. xID replaces your username and password with a cookie and a security mechanism that finds out if anyone tries to copy this cookie to pose as you. xID is therefore both simple and secure.