Abstract: A method of interfering with unauthorized distribution of protected content via a computer network comprises receiving a query for content from a requesting device connected to the network; determining whether the query relates to the protected content; and in the event that the query relates to the protected content, automatically taking an interfering action in respect of the requesting device. An apparatus, computer program and system of network sentries is also provided.

Abstract: A method for presenting dynamic advertising comprises providing an advertising presentation device; regularly receiving electronic context data related to the advertising presentation device; on the basis of the context data, automatically generating context-based advertising; and causing the advertising presentation device to present the context-based advertising. The method is useful in particular for mobile advertising presentation devices, as it enables advertising to be dynamically generated based on regularly received context data such as presentation device location, date/time, user input at the advertising presentation device. Increased relevance of the advertisement to the observer is therefore provided.