Abstract: The presently disclosed subject matter includes a system, a method and a computer program product enabling communication between nodes, by establishing neighborhood relationships between nodes belonging to a network. When an originator node generates an event, data relating to the event is sent to neighboring nodes of the originator node and to the parent node of the originator node for facilitating association of new neighboring nodes to the originator nodes. If a response is received from a receiving node, the receiving node is updated as a new neighboring node to the originator node.

Abstract: A computer-implemented method, computerized apparatus and computer program for receiving and processing user requests, the method comprising: receiving a request for content, the request associated with user credentials; determining a policy associated with the user, in accordance with the user credentials; receiving the content and metadata associated with the content; obtaining a part of the content to be masked; creating an overlay of the content in accordance with the policy and with the metadata, the overlay masking a part of the content; and associating the overlay with the content, such that the part of the content is not available to the user.