CONTENT DATA REPRODUCTION SYSTEM AND RECORDING DEV

专利名称：CONTENT DATA REPRODUCTION SYSTEM

AND RECORDING DEVICE

发明人：Shinichi Matsukawa,Akihiro Kasahara,Hiroshi

Suu,Akira Miura

申请号：US14274788申请日：20140512

公开号：US201402529A1公开日：20140925

专利附图：

摘要：To exclude any unauthorized device from a system and thereby prevent illegaluse of content data, a memory card stores a service key Ksrv for encrypting content key

data Kc in a hidden area . The memory card stores answer data Ato be obtained whenquestion data Q is fed to a host function F possessed by an authorized host device , withencryption applied to the answer data Aby the service key Ksrv. When the question dataQ is provided to the host device , answer data Ais obtained based on the question data Qand the host function F. A comparison unit judges match or mismatch of the answer dataAand the answer data A. When they match, the memory card decrypts the content keydata Kc encrypted by the service key Ksrv and sends it to the host device

申请人：KABUSHIKI KAISHA TOSHIBA

地址：Tokyo JP

国籍：JP

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