c9f92513   
   XPost: comp.dsp, sci.crypt, sci.electronics.design   
   From: gah@ugcs.caltech.edu   
      
   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.   
      
   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.   
      
   -- glen   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)