c9f92513   
   XPost: comp.dsp, sci.crypt, sci.electronics.design   
   From: peter2@hipson.net   
      
   On Thu, 17 Dec 2009 17:44:12 -0800 (PST), 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.   
   >>   
   >> DS   
   >   
   >um,, is that why General Instrument was able to do it did it 15 years   
   >ago for HBO?   
   >   
   >Mark   
   >   
      
   They didn't do the video, just the audio. Video was a very simple   
   inversion technique, that was trivial to break. The audio was DES (so   
   they said) encrypted, but there were several holes in the system that   
   rendered it a bit less secure.   
      
   --- SoupGate-Win32 v1.05   
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