US Patent 10038613 Relaying internet census information

A census server provides measurement reports describing clients accessing a specified network-based service to a measurement agency via a network. The census server receives census events from clients used by users via the network. The census events describe usage of a network-based service by the clients. The census server processes the census events to produce measurement reports describing the usage of the network-based service. The processing includes filtering specified information out of the census events to prevent the measurement reports from identifying the users of the clients. The measurement agency may use the measurement reports, for example, to describe how the clients tend to access and use the service.