Xref: utzoo sci.electronics:8273 sci.crypt:2398 Newsgroups: sci.electronics,sci.crypt Path: utzoo!henry From: henry@utzoo.uucp (Henry Spencer) Subject: Re: Telephone privacy gadgets Add: Cryptography Message-ID: <1989Oct19.154929.19256@utzoo.uucp> Organization: U of Toronto Zoology References: <799@mccall.uucp> <776@ariel.unm.edu> <790@ariel.unm.edu> Date: Thu, 19 Oct 89 15:49:29 GMT In article <790@ariel.unm.edu> ee5391aa@hydra.unm.edu.UUCP (Duke McMullan n5gax) writes: >Expensive and easy to defeat -- probably... Most any non-digital scrambler, no matter how tricky, is probably going to fall under this heading. There is lots and *lots* of redundancy in the human voice, and it's very hard to hide it completely. In WW2, somebody at Bell Labs (I think it was) discovered that the then- current top-security scrambler system could be understood with the unaided ear after a bit of practice. -- A bit of tolerance is worth a | Henry Spencer at U of Toronto Zoology megabyte of flaming. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu