Cryptographic sanction server and methods for use therewith

摘要

A sanction server includes a network interface that receives a request for media content from a client device and transmits first sanction data to a caching server and second sanction data to the client device. A sanction processing module generates the first sanction data based on a random number and generates the second sanction data based on the random number. The caching server generates first cryptographic data based on the first sanction data and sends the first cryptographic data to the client device. The client device generates second cryptographic data based on the first sanction data and sends the second cryptographic data to the caching server. The caching server generates a scrambling control word based on the first sanction data and the second cryptographic data. The client device generates the scrambling control word based on the second sanction data and the first cryptographic data.