Content transmission apparatus, content reception

专利名称：Content transmission apparatus, content

reception apparatus, content transmissionprogram, and content reception program

发明人：Yusei Nishimoto,Tatsuya Kurioka,Toshihiro

Uehara,Seiichi Namba

申请号：US10433068申请日：20030529

公开号：US20040052379A1公开日：20040318

专利附图：

摘要：A content transmission method, a content reception method, an apparatus and

a computer program using same, that improve the efficiency of descrambling a

scrambled content, make the management of cryptography keys for descrambling easy,and protect the copyright of contents, are provided. A content transmission apparatusthat encrypts and transmits contents and a content reception apparatus that receives theencrypted contents are provided. The content transmission apparatus includes a contentscrambling unit that encrypts contents using a scrambling key Ks, a content key Kc, awork key Kw, a master key Km, and a multiplexing unit that transmits multiplexedcontents. The content reception apparatus includes a separating unit that receives andseparates the multiplexed encrypted content, and a content descrambling unit thatobtains the contents by descrambling encrypted information separated by theseparating unit

申请人：NISHIMOTO YUSEI,KURIOKA TATSUYA,UEHARA TOSHIHIRO,NAMBA SEIICHI

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