1. A computer implemented method comprising: receiving images from a user of a social networking system; associating one or more received images with a signature of a camera used to capture the received images, wherein the signature of the camera comprises characteristic information about the camera obtained from images taken from the camera; identifying a user account associated with the camera based on an action related to the user account and at least one image captured using the camera; identifying an object representing an entity in the social networking system, the object associated with the camera based on an action related to the object and at least one image captured using the camera; and storing an association between the user account and the object, the association based on each of the user account and the object being related to at least one image captured using the camera.