Abstract: Systems and methods herein describe a network system for federated searching. The systems and methods receive a search query, transmit the search query to search providers, receive search results corresponding to the search query, extract metadata from each search result, generate matched groupings comprising a first search results that have matching metadata, generate a ranked list of the matched groupings and a plurality of relevance scores, identify a second subset of search results based on the ranked list of matched groupings, and cause display of the second subset of search results on a graphical user interface of a computing device.

Abstract: Methods utilizing social networks and their content browsing history and other attributes are utilized for selecting and sorting content when servicing content requests. Dynamically-formed virtual profiles of a user may also be used for collaborative content browsing. It thus combines the “traditional” keyword and relevancy with the preferences from each user's social network browsing history for content selection and sorting. Mathematical set and its properties to are used to describe some of the applications and implementations.

Abstract: Systems and methods for authenticating a message receiver and for authorizing the authenticated receiver to manipulate the received message are disclosed. Various message delivery mechanisms and sender authentication mechanisms are used to perform receiver authentication. When a message (message A) is delivered to the receiver, the receiver cannot view or manipulate the message until the receiver is authenticated by the sender or by a sender-authorized third party. In this system, the receiver sends out a message (message B) to the sender to indicate the reception of the message A. Message B is then authenticated using a sender authentication mechanism. Once Message B is authenticated as coming from the intended receiver, the sender of message A authorizes the appropriate privilege for the receiver to manipulate message A.