Broadcasting method and broadcast receiver

Details Broadcasting method and broadcast receiver Broadcasting method and broadcast receiver

2008-06-30

2011-10-25

Vu, Kim (Department: 2435)

Cryptography

Communication system using cryptography

Reexamination Certificate

active

08045710

ABSTRACT:
A broadcasting method and a broadcast receiver whereby contents are first distributed only for storage so that the stored contents are later played back in a time period predetermined by the distributing party, the contents being encrypted for protection against unauthorized reproduction in any time period other than the intended one. A content is transmitted together with a begin store command in a first time period for storage onto a storage medium at the receiving side. In a time period subsequent to the first time period, a play command is broadcast so as to get the content retrieved from storage for playback. The content should preferably be encrypted. The encrypted content is decrypted and played back using a decryption key transmitted along with the play command in the second time period. The decryption key is deleted the moment the decryption process is terminated.

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