A system for performing a login process for a user profile at an auxiliary device, the system comprising a first obtaining unit configured to obtain information associated with each of a plurality of image frames displayed by a first device, the first device being logged in with the user profile, a second obtaining unit configured to obtain a plurality of images captured by a camera associated with the auxiliary device, a comparison unit configured to compare the information associated with plurality of image frames displayed by the first device with a plurality of corresponding images captured by the camera to identify a degree of similarity for each corresponding image pair, wherein corresponding images are those associated with a same respective display and capture time, and an authentication unit configured to execute a login to the auxiliary device with the user profile in response to a determination that the degree of similarity meets or exceeds a threshold value for at least a subset of the plurality of corresponding image pairs.