[linux-dvb] Is it possible to descramble signal from 2 frontends?

kurt xue kurtxue at gmail.com
Thu Aug 14 11:52:14 CEST 2008


Thanks Jelle, and Christophe, thanks for your reply. I was thinking in a
technical (developer's) way, but didn't mean to start an illegal issue...
Anyway I know the answer now, thanks

On Mon, Aug 11, 2008 at 3:03 PM, Jelle De Loecker <skerit at kipdola.com>wrote:

> Christophe Thommeret schreef:
> > Le Monday 11 August 2008 11:22:43 Jelle De Loecker, vous avez écrit :
> >
> >> Christophe Thommeret schreef:
> >>
> >>> Le Monday 04 August 2008 18:58:17 kurt xue, vous avez écrit :
> >>>
> >>>> Hi,
> >>>>
> >>>> I have two TechnoTrend DVB-C PCI card and 1 CAM, is it possible to use
> >>>> this CAM to descramble signal from frontends of both DVB card?
> >>>>
> >>>> Thanks in advance for any reply!
> >>>> Kurt
> >>>>
> >>> No.
> >>>
> >> That isn't a very helpful answer to his problem, is it?
> >> He might have wanted any reply, but trying to be friendly wouldn't have
> >> killed you.
> >>
> >> I'll give this a go:
> >>
> >> There is a way, called "cardsharing", to decode multiple streams with 1
> >> cam.
> >>
> > CAM != CardReader
> >
> >
> >> Do note, however, that some people think this is illegal, but that's
> >> because cardsharing has a bad name. There are people who perform this
> >> "cardsharing" with other people over the internet, which IS illegal.
> >>
> > Getting control words outside the "secured" area is illegal.
> >
> >> Because of this most people don't want us to talk about *any *kind of
> >> cardsharing, just to be on the safe side.
> >> I can follow their reasoning but it still resembles some kind of
> >> illogical censor which we should not tollerate!
> >> But I digress ...
> >>
> >> Because this local cardsharing is not illegal (at least not where I'm
> >> from), some set top boxes you buy in the store also have multiple
> >> (working) tuners, so they perform some kind of internal cardsharing as
> >> well.
> >>
> > It's not a matter of cardsharing. It's of course technicaly possible to
> have
> > one cam beeing feed with streams from different tuners, but not on most
> PC
> > DVB cards like the TT ones where CI is wired to the card.
> >
> >
> >> Please correct me if I'm wrong or being ignorant ...
> >>
> > Done.
> >
> What is the definition of this "secured" area?
>
> According to you it's perfectly ok to decrypt multiple streams with one
> cam... but only if it is with the correct, approved, hardware?
>
> In essence, this is a shortcomming of the TT hardware, can we really
> tell people not to fix it using software because it'll break some
> ridiculous IP law, or whatever?
>
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