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Old 12-02-2010, 13:04   #367
TheDon
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Re: New Smart card areas channel changes

Quote:
Originally Posted by The-Darkside View Post
The cards only process the relevant CA system. i.e the new cards only process the N3 ECM's. So yes your area is on the NGTV platform.
Just to make this clearer.

Encryption on digital tv is a two part process.

The video is actually scrambled using CSA (Common Scrambling Algorithm) every DVB system uses this same algorithm. This has nothing to do with the encryption used on the platform.

CSA scrambles the video, and descrambles it using a codeword.

That codeword is broadcast to subscribers in an ECM (entitlement control message) which gives the STB the codeword to descramble the video, doing that in plaintext is obviously stupid, so the ECMs are encrypted. This is where the different encryption systems come in.

You can broadcast as many different ECMs on the network as you want, in as many different encryption schemes as you want, the STB will ignore all but the ones meant for it, so what's happening now is the ECMs are being sent encrypted in both n3 and n1, they both have exactly the same information in them, but n3 cards decode the n3 ones, n1 the n1.

So it's not that they're "sending the channels using both", just the messages that tell your STB how to decode them.

They'll start to stop the n1 ECMs on some channels (as ECMs are channel specific) and then eventually turn off the n1 ECMs altogether.
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