Wiretap-proof telephone (Jan, 1966)

Wiretap-proof telephone
This scrambler keeps private phone conversations safe from wiretappers and eavesdroppers. Fitted to an ordinary handset, it needs no electrical connection, has its own power source. To hear, a person needs an unscrambler coded identically. Delcon Division, Hewlett-Packard Co., Palo Alto, Calif., sells it for $275, keeps your name and code locked in its vault.

  1. John M. Hanna says: November 24, 20081:59 pm

    “And it only weighs 28 pounds.”

  2. Charlene says: November 24, 20083:43 pm

    If that woman was wearing any more makeup she wouldn’t be able to open her eyes.

  3. Al Bear says: November 24, 20085:15 pm

    Cool! it’s the compact size one too! 😉

  4. Myles says: November 24, 20085:56 pm

    My first thought was “she’s ironing her head.”

  5. Mike says: November 24, 20088:37 pm

    It would be better if you could select the code yourself.
    I wonder if something like this old technology would be old enough to confuse modern technology that tried to decode it.

  6. Casandro says: November 24, 200810:29 pm

    I guess this was just frequency inversion back then. Nothing special, I have a radio that decodes it as a flip of a switch.

  7. Jon says: November 25, 20083:01 am

    “Are you using the scrambler?”
    “I can’t hear you. I’m using the scrambler.”

  8. g663 says: November 27, 20081:23 am

    Frequency inversion scrambler with fixed inversion point.

    Strictly speaking not an encryption system.

    Some people can unscramble inverted speech with their ears.

  9. fred says: November 29, 20086:20 am

    wow that chick is wearin a rubber nose

  10. dascoyne says: December 23, 20085:23 pm

    Gee. I’d like to see what the prototype looked like.

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