A method for receiving digital content data on a user's system for playing or recording, the content data being compressed and encrypted with a first encrypting key, said method comprising the steps of: tuning a receiver to a selected frequency; receiving content data through a broadcast transmission...http://www.google.com.au/patents/US6597891?utm_source=gb-gplus-sharePatent US6597891 - Combining online browsing and on-demand data broadcast for selecting and downloading digital content
