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EP0167442A3 - Secure communication system - Google Patents

Secure communication system Download PDF

Info

Publication number
EP0167442A3
EP0167442A3 EP85401239A EP85401239A EP0167442A3 EP 0167442 A3 EP0167442 A3 EP 0167442A3 EP 85401239 A EP85401239 A EP 85401239A EP 85401239 A EP85401239 A EP 85401239A EP 0167442 A3 EP0167442 A3 EP 0167442A3
Authority
EP
European Patent Office
Prior art keywords
frequency
message
receiver
transmitter
data link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85401239A
Other languages
German (de)
French (fr)
Other versions
EP0167442A2 (en
Inventor
William N. Waggener
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fairchild Weston Systems Inc
Original Assignee
Fairchild Weston Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fairchild Weston Systems Inc filed Critical Fairchild Weston Systems Inc
Publication of EP0167442A2 publication Critical patent/EP0167442A2/en
Publication of EP0167442A3 publication Critical patent/EP0167442A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Communication Control (AREA)

Abstract

A jam resistant, low-cost data link, wherein short burst messages are frequency-hopped on a message-by-message basis. The data link includes a transmitter and a receiver which initially are set at a common, predetermined frequen­ cy. The message transmitted during each burst includes encrypted data identifying the frequency at which the next message will be transmitted to enable the receiver to tune to that frequency. If the initial transmission is jammed, the transmitter and receiver are preprogrammed to change to a preset back-up frequency. The receiver will request retrans­ mission before the next transmission frequency is changed if a received message is garbled.
EP85401239A 1984-06-29 1985-06-21 Secure communication system Withdrawn EP0167442A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US62588584A 1984-06-29 1984-06-29
US625885 1984-06-29

Publications (2)

Publication Number Publication Date
EP0167442A2 EP0167442A2 (en) 1986-01-08
EP0167442A3 true EP0167442A3 (en) 1986-12-30

Family

ID=24508031

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85401239A Withdrawn EP0167442A3 (en) 1984-06-29 1985-06-21 Secure communication system

Country Status (3)

Country Link
EP (1) EP0167442A3 (en)
CA (1) CA1244886A (en)
IL (1) IL75670A (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL82561A (en) * 1986-05-27 1991-12-15 Fairchild Weston Systems Inc Secure communication system for multiple remote units
AU6978794A (en) * 1993-06-23 1995-01-17 Colebrand Limited Identification beacon
GB2307624B (en) * 1995-11-23 2000-02-09 Motorola Israel Ltd Data transmission method for a channel hopping communication system
GB2456534A (en) * 2008-01-17 2009-07-22 Vodafone Plc Changing communication channels for secure encrypted communications
US8792640B2 (en) 2008-01-29 2014-07-29 Sony Corporation Systems and methods for securing a digital communications link
US8457175B2 (en) 2008-01-29 2013-06-04 Sony Corporation Systems and methods for securing a digital communications link
US8884821B2 (en) 2009-12-21 2014-11-11 Continental Automotive Systems, Inc. Apparatus and method for determining vehicle location
US8319615B2 (en) 2009-12-21 2012-11-27 Continental Automotive Systems, Inc. Apparatus and method for detecting jamming of communications
US10027682B2 (en) 2009-12-21 2018-07-17 Continental Automotive Systems, Inc. Apparatus and method for detecting a cloned base station
US9102293B2 (en) 2009-12-21 2015-08-11 Continental Automotive Systems, Inc. Apparatus and method for reducing false alarms in stolen vehicle tracking
US8896431B2 (en) 2009-12-21 2014-11-25 Continental Automotive Systems, Inc. Apparatus and method for compromised vehicle tracking
US8611847B2 (en) 2009-12-21 2013-12-17 Continental Automotive Systems, Inc. Apparatus and method for detecting communication interference
US8320872B2 (en) 2009-12-21 2012-11-27 Continental Automotive Systems, Inc. Apparatus and method for broadcasting the detection of RF jammer presence
US8175573B2 (en) * 2009-12-21 2012-05-08 Continental Automotive Systems, Inc. Apparatus and method for maintaining communications with a vehicle in the presence of jamming
US8159336B2 (en) 2009-12-21 2012-04-17 Continental Automotive Systems Us, Inc. Apparatus and method for maintaining communication with a stolen vehicle tracking device
US8639209B2 (en) 2009-12-21 2014-01-28 Continental Automotive Systems, Inc. Apparatus and method for detecting a cloned base station
GB2485142A (en) 2010-10-27 2012-05-09 Nds Ltd Secure broadcast/multicast of media content
US9031538B2 (en) 2012-02-16 2015-05-12 Continental Automotive Systems, Inc. Method and apparatus to determine if a cellular jamming signal is malicious or non-malicious based on received signal strength
US9119064B2 (en) * 2013-11-20 2015-08-25 At&T Intellectual Property I, L.P. Method and apparatus for providing broadcast channel encryption to enhance cellular network security

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005428A (en) * 1975-05-15 1977-01-25 Sound Technology, Inc. Secure remote control communication systems
JPS5530227A (en) * 1978-08-24 1980-03-04 Matsushima Kogyo Co Ltd Communication system
FR2485305A1 (en) * 1980-06-19 1981-12-24 Oak Industries Inc SIGNAL ENCODING DEVICE HAVING DIGITAL INFORMATION
DE3230726A1 (en) * 1982-08-18 1984-02-23 Siemens AG, 1000 Berlin und 8000 München Method for interference-proof short-wave radio transmission

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005428A (en) * 1975-05-15 1977-01-25 Sound Technology, Inc. Secure remote control communication systems
JPS5530227A (en) * 1978-08-24 1980-03-04 Matsushima Kogyo Co Ltd Communication system
FR2485305A1 (en) * 1980-06-19 1981-12-24 Oak Industries Inc SIGNAL ENCODING DEVICE HAVING DIGITAL INFORMATION
DE3230726A1 (en) * 1982-08-18 1984-02-23 Siemens AG, 1000 Berlin und 8000 München Method for interference-proof short-wave radio transmission

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE 1977, ULTRASONICS SYMPOSIUM PROCEEDINGS, Phoenix, US, 26th-28th October 1977, pages 505-510, Institute of Electrical and Electronics Engineers, New York, US; J.U. BEUSCH: "Roles of SAW and CCD in current spread spectrum communications systems" *
RADIO AND ELECTRONIC ENGINEER, vol. 52, no. 5, May 1982, pages 246-258, Institution of Electronic and Radio Engineers, London, GB; P.M. GRANT: "The potential application of analogue matched and adaptive filters in spread-spectrum communications" *

Also Published As

Publication number Publication date
EP0167442A2 (en) 1986-01-08
CA1244886A (en) 1988-11-15
IL75670A (en) 1989-06-30

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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PUAL Search report despatched

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Effective date: 19890607

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18D Application deemed to be withdrawn

Effective date: 19900630

RIN1 Information on inventor provided before grant (corrected)

Inventor name: WAGGENER, WILLIAM N.