Abstract: An example implementation includes providing original content on a content source; inserting a unique content ID into content information associated with the original content; associating the original content with an author profile; detecting a following of the hyperlinks between the original content and a second content, via a content aggregation based on communication with the content source via a web index; applying a timestamp to the original content, and providing the original content having the timestamp to the web index.

Abstract: A unified search entity, which provides at least visual query based web searching and an associated mechanism for expressing privacy preferences, obtains, from a requester, a visual query including at least a first facial image. The unified search entity identifies, via facial recognition on the at least first facial image, an identity of an individual subject of the at least first facial image and/or at least a second facial image of the individual subject associated with the at least first facial image. The unified search entity obtains, from the individual, via the mechanism for expressing privacy preferences, a plurality of privacy preferences including a visual query preference. The identity of the individual subject and/or the at least second facial image are communicated from the unified search entity to the requester only if permitted by the visual query preference.

Abstract: At a social network server, a request is obtained from a first user to upload a digital visual medium (digital photograph or digital video). The digital visual medium is marked for identification thereof. At the social network server, a request is obtained from a second user to upload the digital visual medium. Based on the marking, it is determined whether the request from the second user to upload the digital visual medium is inappropriate.