Tema: Re: SKY HD nebeliko
Autorius: Deivis <deivis @ autos . lt>
Data: 2014-06-28 23:55:04
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Sky's new pairing doesn't introduce any significant differences to the existing 
NDS data, that data is still encrypted so only a genuine card can decrypt it, 
but what it does do is add an additional layer of encryption between the 
box/card to prevent their cards from being used in card servers like oscam or 
CCcam (what your c line uses to decrypt channels).

A new HD box running the latest firmware is able to take the incoming NDS data 
[ECMs/EMMs] from the MPEG (video) stream and further encrypt it before sending 
it to the card.

An old HD box (or an SD box) just continues as it did before, extracting the 
NDS data from the MPEG stream and feeding it to the card.

This design allows Sky to alter NOTHING to the existing NDS code, which is 
essential to (a) prevent loggers/hackers from running comparators over logs 
from the then/now data streams and (b) allow older boxes to work as before.

Remember, the change has NOT happened at the NDS level, it has happened at the 
firmware level of both the new HD boxes and the existing cards.

It's the boxes that are instructed to use the pairing algorithm [or not] for a 
particular channel(s) [or more accurately, entitlement group/level]

If you place a card in a new HD box, the card will be instructed to accept the 
newly encrypted data using the sky box's pairing key...

If you then move the card back to oscam, it will continue to expect that 
encrypted data for that channel(s) and try to decrypt it...
Of course, as the incoming data is NOT encrypted (coming from oscam for 
example) you'll get nothing worthwhile back..

So what happens when you put a card back in oscam or put it back in an SD box 
or an old HD box and leave it..?
If the card is unable to verify it's running in a new HD box [after x amount of 
time (or cycles) or following a new install/pairing process], it reverts back 
to the original system we all know and love, which is of course easy for most 
to share.
[I'm sure their lawyers have reminded Sky not to enforce a blackout on paying 
customers for fear of prosecution or maybe Sky have acknowledged some people 
may use their own older boxes in the event of a failure..]

How long Sky allow the card to revert back on the other hand is the question 
most pay servers should be considering..

As it stands now the new system does nothing to prevent c/s, however, once Sky 
are happy they have updated all the smartcards (all those EMMs you've been 
seeing...) and have completed most (if not all) of the box upgrades, expect to 
see some disruption.

When this will be, you'll have to ask the boys over at Sky (and I'm not talking 
about their installers / customer support agents here lol)

Here's a quick overview of both the old and new data exchange:

Current:
ECM/EMM Data is fed to the box via the MPEG stream, it then passes it to the 
card for a response.

New:
ECM/EMM Data is fed to the box via the MPEG stream, it then further encrypts 
the data using a pairing key before passing it on to the card. The card 
decrypts this in order to then decrypt and process the original ECM/EMM 
command. The reply is then encrypted [again using the pairing key] and sent 
back to the box, which then decrypts and executes it.

Both the original ECM/EMM data and the reply have not changed, the only thing 
that has changed is the way the data was exchanged between the box and the 
card..

As has been mentioned (and seemingly ignored) beforehand, it is possible to use 
a card which has been updated to the new system by dumping the key from a new 
HD box (pretty much in the same way you dump an RSA key from a Nagra3 UK Cable 
box) which then allows the use of something like newcs, utilising the receiver 
ID of course.

This information is not publically available as this would allow both ViasatHD 
and SkyHD (shortly) to be shared and to be honest, many that have worked on 
this are sick of all the exploitation...

Deivis

tranzoo formulated the question :
> tai ir dabar panasiai daro. problema liko programos sukurime, kuri emuliuotu cpu.
>
>
> "monaxas" <monaxas@delfi.lt> wrote in message news:lohq54$ejj$1@trimpas.omnitel.net...
>> ... conax2, taip ir neišlupom. Iš to gime šara
>>
>> "monaxas" <monaxas@delfi.lt> wrote in message 
>> news:lohq2t$ei9$1@trimpas.omnitel.net...
>>> Priminei laikus, kai masterkeju lupdavom išnaudodami kolektyvini kompu pajeguma, 
>>> panašiai kaip SETI at Home...
>>>
>>> "Tomas D." <mailsoc@gmial.com> wrote in message 
>>> news:lohm20$ch1$1@trimpas.omnitel.net...
>>>> Esminis klausimas ar yra tik chip-pairingas, t.y. kortele priskiriama tik
>>>> tam tikram cpu ar dar ir raktai kazkaip specializuojami? Nes nelabai suvokiu
>>>> kokio srauto reiktu, kad visiems skirtingiems klientams butu isduodamas
>>>> skirtingas raktas...
>>>> Tad jeigu risamos tik korteles prie cpu, tai teoriskai imanoma paemus
>>>> koduota srauta ir isejusi nekoduota srauta sulygint ir issitraukt rakta.
>>>>
>>>>
>>>> "budulis vulgaris" <bv@lindyne.lt> wrote in message
>>>> news:logjaa$h59$1@trimpas.omnitel.net...
>>>>> 2014-06-26 10:34, Vytautas rase:
>>>>>> Kazkokia info irgi suradau, trumpai kaip sako: Kekvienam individualus
>>>>>> raktas kuris priristas prie broadcom cpu tiuneryje.
>>>>>
>>>>> Prie korteles + prie to broadcom chipo.
>>>>>
>>>>>
>>>>
>>>> 

-- 
Deivis [persona], Vilnius
Passat '08 2.0 FSI / A4 '05 1.8tq