[NOISE] Cable-TV-Piracy-Punks

[Perry E. Metzger]

Mike Duvos writes:
> In the system I described, a person might make a lower bandwidth
> attempt to defeat the system by leaking either the periodically
> changing random session key used to encrypt the video stream, or
> the unique cryptographic key belonging to a particular smart card
> authorized to view the program.  We have postulated that the
> latter is not recoverable even by destructive reverse engineering
> of a specific card,

Why not? If the card knows its own key, then someone else can probably
get the key out by some nasty mechanism.

.pm