EXTERNER SICHERHEITSMODUL FÜR EINEN FERNSEHSIGNALDETEKTOR
摘要
A decoder comprises a fixed security element (719), or replaceable security module, which includes a processor (713). The processor processes a once-encrypted key based on a key (SSN0) to generate a working key (KOM1) and processes scrambled program data based on the working key to generate decoder control information. The decoder is useable for descrambling scrambled signals. <IMAGE>
申请公布号
DE69131285(D1)
申请公布日期
1999.07.08
申请号
DE1991631285
申请日期
1991.01.30
申请人
SCIENTIFIC ATLANTA, INC., SOUTH NORCROSS, GA., US
发明人
GAMMIE, KEITHY, BEVERLY, MARKHAM, ONTARIO L3P 1W1, CA