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Text File  |  1992-11-08  |  1.1 KB  |  22 lines
  1. Newsgroups: sci.crypt
  2. Path: sparky!uunet!pmafire!news.dell.com!swrinde!zaphod.mps.ohio-state.edu!rpi!think.com!spool.mu.edu!yale.edu!yale!gumby!destroyer!sol.ctr.columbia.edu!news.cs.columbia.edu!polish
  3. From: polish@cs.columbia.edu (Nathaniel Polish)
  4. Subject: Re: Encrypted phones, keys, taps, ...
  5. Message-ID: <BxCyDv.8FL@cs.columbia.edu>
  6. Sender: news@cs.columbia.edu (The Daily News)
  7. Organization: Columbia University Department of Computer Science
  8. References: <1992Nov6.012330.4470@shearson.com> <1992Nov7.045122.15675@netcom.com>
  9. Date: Sat, 7 Nov 1992 18:08:19 GMT
  10. Lines: 10
  11.  
  12.  
  13. It was suggested that a human listener would be required to determine when
  14. the scrambled speech was "cleared" because recognision technology is not
  15. up to it.  This is just plain false.  The spectral characteristics of clear
  16. versus scrambled speech are easily distinguished.  Scrambled speech is useful
  17. when the opponent does not have much time available to unscramble -- as is
  18. the case in battlefield communications.  The value of the information declines
  19. so fast that unscrambling is often not worth the trouble.
  20.  
  21. Nathaniel Polish
  22.