CONTENT TRANSMISSION APPARATUS, CONTENT RECEPTION APPARATUS, CONTENT TRANSMISSION PROGRAM, AND CONTENT RECEPTION PROGRAM

摘要

A content transmission/reception method,a content transmission/reception apparatus,and a content transmission/reception program capable of enhancing efficiency of descrambling a scrambled content,facilitating management of an encryption key used for descrambling,and protecting content copyright.The apparatus includes a content transmission device(3)for encrypting and transmitting a content and a content reception device(5)for receiving the content.The content transmission device(3)has a content scrambling unit(7)for encrypting a content by using a scrambling key Ks,a content key Kc,a work key Kw,and a master key Km,and a multiplexing unit(9)for multiplexing the content and transmitting it as a multiplexed encrypted content.The content reception device(5)has an isolation unit(13)for receiving and isolating a multiplexed encrypted content,and a content descramble unit(15)for decoding the encrypted information isolated by the isolation unit(13)to obtain the content.