A GLOBAL COPY PROTECTION SYSTEM FOR DIGITAL HOME NETWORKS

摘要

A method for providing local security of audio and video content duringtransmission and storage within digital home networks. Scrambled content maybe recorded in all conditions, however, only authorized copies are processedfor descrambling and viewing. Content is protected within a network byrebundling the keys required for descrambling, e.g., the TDES keys, into a newECM (LECM), which is protected by a local public key.