b169a19c
XPost: comp.dsp, sci.crypt, sci.electronics.design
From: jya@ieee.org
Le Chaud Lapin wrote:
> On Dec 17, 8:15 pm, glen herrmannsfeldt wrote:
>> In comp.dsp Mark wrote:
>> (someone wrote)
>>
>>>> Passing encrypted video over a satellite network built for unencrypted
>>>> analog video is not a trivial challenge. As far as I know, there
>>>> exists no scheme to do this that has not been broken already.
>> (snip)
>>
>>> um,, is that why General Instrument was able to do it did it 15
>>> years ago for HBO?
>> He said "that has not been broken already". As far as I know,
>> both the analog in digital encryptions have been broken.
>>
>> It slows down most people, though, so it still works.
>
> When has 256-bit Rijndael been broken? Or 128-bit for that matter? Or
> RC6? Or many other symmetric ciphers?
>
>> The usual analog encryption reverses the polarity of some scan
>> lines and/or frames. It isn't hard to figure out fairly reliably
>> a polarity reversal.
>
> Take a look at the SkyGrabber site. It looks like the whole thing is
> based on satellite Internet access, which of course, is entirely in
> the digital domain:
>
> http://www.skygrabber.com/en/skygrabber.php
"Hacking" is the wrong term for that. Am I hackinf usenet with Thunderbird?
Jerry
--
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