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

[David Toth <dave@iris.geobio.elte.hu>]

 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



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