Article View: sci.crypt
Article #2650Re: Motorola 'Secure-Clear' Cordless Telephones
From: Phil Karn
Date: Sun, 03 Jan 1993 11:03
Date: Sun, 03 Jan 1993 11:03
14 lines
1198 bytes
1198 bytes
In article <1993Jan3.054517.29505@colnet.cmhnet.org> res@colnet.cmhnet.org (Rob Stampfli) writes: >>Another is that Bell Labs developed a truly remarkable (given the >>technology of the day) secure speech system that really was secure. It >How did they keep them in sync? Good question. I seem to remember that this was a problem. The system was written up in IEEE Spectrum some years ago, but I don't have a copy on hand. I believe it was the same issue that explained how Hedy Lamarr (yes, the movie actress) invented frequency hopping, one of the fundamental forms of spread spectrum radio. Phil
Technical Details
Message-ID:
<1993Jan3.110338.25314@qualcomm.com>Path:
arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!think.com!ames!network.ucsd.edu!qualcom.qualcomm.com!servo.qualcomm.com!karnReferences:
<1993Jan2.174522.12032@qiclab.scn.rain.com> <1993Jan2.234049.27767@qualcomm.com> <1993Jan3.054517.29505@colnet.cmhnet.org>Show Full Headers
Complete Article Headers
Newsgroups: sci.crypt Path: arc1-ca.pugleaf.net!sparky!uunet!spool.mu.edu!think.com!ames!network.ucsd.edu!qualcom.qualcomm.com!servo.qualcomm.com!karn From: karn@servo.qualcomm.com (Phil Karn) Subject: Re: Motorola 'Secure-Clear' Cordless Telephones Message-ID: <1993Jan3.110338.25314@qualcomm.com> Sender: news@qualcomm.com Nntp-Posting-Host: servo.qualcomm.com Organization: Qualcomm, Inc References: <1993Jan2.174522.12032@qiclab.scn.rain.com> <1993Jan2.234049.27767@qualcomm.com> <1993Jan3.054517.29505@colnet.cmhnet.org> Distribution: na Date: Sun, 3 Jan 1993 11:03:38 GMT Lines: 15