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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