XPost: comp.dsp, sci.crypt, sci.electronics.design   
   From: higgsfield@whutthableapduyoukno.org   
      
   On Fri, 18 Dec 2009 05:56:55 -0500, "Michael A. Terrell"   
    wrote:   
      
   >   
   >Rick Jones wrote:   
   >>   
   >> In comp.protocols.tcp-ip Mark  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. The problem is that encryption works partly by diffusing   
   >> > > information so that no part of the output looks like any part of   
   >> > > the input. The satellite link is filled with errors and distortion   
   >> > > that have to be contained to retain adequate video quality.   
   >>   
   >> > um,, is that why General Instrument was able to do it did it 15 years   
   >> > ago for HBO?   
   >>   
   >> Is it "known" that the GI stuff (irony :) isn't cracked?   
   >   
   >   
   >   You do know there were two levels of Videocipher? VC-1 was designed   
   >for military applications.   
      
     Total bullshit.  It was designed for backhaul work.  It was also used   
   by companies like General Motors, to feed training seminars, etc. to all   
   their dealerships.  They were one of the first OTA educational systems of   
   that depth.   
      
     ALL the major networks ended up using it, and that is what made GI the   
   de facto standard, and is why they were UNsuccessfully sued as a   
   monopoly.  Uplink encoding is used by any content provider, and they must   
   use GI gear because that is what all the birds use.  So they ARE a   
   monopoly, by default, but it is not their fault all the networks went   
   with their gear.   
      
   > VC-II was a very scaled down version done for   
   >HBO in the early '80s.   
      
     VC-I was in use in 1983 and from then on.   
      
     It was retired on the last day of last year, 2008.   
      
     VC-II (1985)"was done for" satellite receivers, uplink encoders and   
   decoders, and backhaul work, not just for HBO.  It was retired in 1993 as   
   piracy had to be nipped out of the system.  That was VC-II RS and that is   
   where the false keys and rolling keys and such came from.  Then came   
   DigiCipher and DigiCipher II.   
      
   >  I installed one of the first VC-II units for   
   >beta testing for HBO at United Video in Cincinnati, Ohio.  That would   
   >make it 25 years.   
      
     It appears that you understand basic math.   
      
     VC-II was hardware items for cable system operators, sure, but it was   
   ALSO hardware items for use in end user satellite set-top boxes, which   
   have nothing to do with cable.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)