Authentication for computer devices can occur in many different ways. Still today, authentication using a username and password is most common. While this type of authentication still works, it is often complicated and cumbersome to enter a username and password which is secure enough to be difficult to break.
US-2010/218249 presents a system and/or a method that facilitates authentication of a user in a surface computing environment. A device or authentication object can be carried by a user and employed to retain authentication information. An authentication component can obtain the authentication information from the device and analyze the information to verify an identity of the user. A touch input component can ascertain if a touch input is authentication by associating touch input with the user. In addition, authentication information can be employed to establish a secure communications channel for transfer of user data. However, access control to computers always benefit from improved usability with the same or higher security.
EP-2 395 446 presents a method for pairing a first device (such as a handset) with a second device (such as a personal computer), said first and second devices being linked to a remote server, said first device comprising an accelerometer and said second device being linked to a third device. The method comprises the following steps: the first device and the second device capture a common movement respectively to the first and to the third devices; the first device and the second device send data resulting from the common movement to the remote server so as to create a unique identifier of the movement; the remote server compares the identifier of the movement of the first device and the identifier of the movement of the second device, and if the identifiers match, the remote server pairs operations performed from the first and the second devices. However, this method requires the user to hold the first device while performing a movement using e.g. a mouse or a touchpad which can be correlated. Such a correlation is cumbersome and resource demanding.