Reception apparatus for authenticated access to coded broadcast signals
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United States of America Patent
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Oct 29, 2002
Grant Date -
N/A
app pub date -
Mar 25, 1998
filing date -
Feb 16, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
Decoding of a broadcast signal is enabled only if it carries an identifier verified by its presence (or absence) in a stored list. The list is loaded from a removable module. Preferably the loading of the list is conditional upon the success of a cryptographically authenticated exchange of signals between the module and the main part of the receiver.
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