Google has developed a method to greatly improve the protection of accounts records of its users. Addition to the recently proposed two-step authentication, based on individual knowledge (password) and personal device (smartphone, which sent SMS with the code), can be USB-key that authenticates the site to which the user enters.
If the resource is a forgery under the services Google, you receive a warning. The limitation of the key may be two reasons. The first – the use of a mobile device: as required USB-port, there can be problems.
The second – to date only the Chrome browser version 38 and above support this technology, however, Google is counting on the cooperation and support from third party developers.