Matan Ziv-Av wrote:
In crypto terms, the CAM (Conditional Access Module) is the algorithm and the subscription card is the key. In the civilized world, the CAM is a pluggable extension board you insert into a slot on the DVB set-top box. Then you insert the subscription card into the CAM. Some of those algorithms were successfully implemented on the PC and can be used for creating a real digital PVR (or for theft-of-service, if you can copy a real subscriber's card).On Wed, 8 Dec 2004, Oded Arbel wrote:
On Wednesday 08 December 2004 17:27, Aviram Jenik wrote:
The problem is that the transmission is encrypted, and only NDS knowsHow do they do it in the more civilized parts ? I assume sat broadcasts are encoded in other continents as well, otherwise anyone with a $200 sat dish can just get any channel for free, and I do know NDS have nice export figures.
how to use the smartcard to decrypt the transmission. This is why the
new YES box was made by NDS - at this point only they can produce the
hardware that emulates the MEMIR.
In the "more civilized parts" they are using other encryption systems. Those systems are decryptable in hardware (CAMs), or in software. As far as I know, there is no CAM for NDS, and no software solution available (except the one from NDS, which only runs on their systems).
In Yes' set-top box, the CAM component (manufactured by NDS) is wired into the device. If anyone would figure out NDS' algorithm + a way to lift the key from the "smart card", we could have a PC perform the decryption part.
I don't know what CAM is used by Hot's set-top boxes. What I *did* notice, however, is that they don't encrypt the public channels (IBA's Channel 1, 2 etc. - you can watch them even without a subscriber card), so they should be capturable by casual DVB-C cards. Another interesting use for a DVB-C card can be tunning into cable Internet channels. I doubt any DVB-C card can broadcast to the cable Internet's upstream.
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