[linux-dvb] Re: Nova + PC Card(pcmcia) driver--is it possible towatch encrypted program by using these devices?

[<mocm@metzlerbros.de>]

David Toth writes:
 >  Hi,
 > 
 > On Mon, 25 Mar 2002 mocm@metzlerbros.de wrote:
 > >> I have a Nova card and a pci PCCard driver(RICOH R5C475II).Is it
 > >> possible to watch the encrypted program by using these two devices?
 > >> Since the Common inteface is pc card compatible,is it possible to use
 > >> the pccard to read the smartcard and decrypt TS stream?
 > >> If possible does there anyone have the datasheet of the R5C475II?It is
 > >> said that this chip is Intel 82365SL and ExCA compatible.
 > >
 > > I don't think the bus is fast enough to do it in realtime. The pins
 > > are also used differently, but you might be able to hack something for
 > > that. Data sheets can be found at
 > > http://pcmcia-cs.sourceforge.net/specs/index.html.
 > 
 >  Are you sure about that? AFAIK the CAM (the PCMCIA card) only returns the
 > actual descrambler key (using informations found in the TS and in your
 > valid subscription card ofcoz'). You still need to descramble the
 > encrypted channel using this key (this is done outside the CAM - e.g. in
 > the AV711x on the rev1.3 card). And the algorithm you need here is
 > something you probably never can get... so the nova card + PCMCIA card
 > reader combination still misses an entity (the descrambler).
 >  Bye,
 >  David

No, decoding is done inside the CAM. Why do you think they are so
expensive?

Marcus



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