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WO1999039464A3 - A system and a method for information security in optical communication networks - Google Patents

A system and a method for information security in optical communication networks Download PDF

Info

Publication number
WO1999039464A3
WO1999039464A3 PCT/IL1999/000044 IL9900044W WO9939464A3 WO 1999039464 A3 WO1999039464 A3 WO 1999039464A3 IL 9900044 W IL9900044 W IL 9900044W WO 9939464 A3 WO9939464 A3 WO 9939464A3
Authority
WO
WIPO (PCT)
Prior art keywords
signals
stream
dfsk
communication network
frequency
Prior art date
Application number
PCT/IL1999/000044
Other languages
French (fr)
Other versions
WO1999039464A2 (en
Inventor
Dan Sadot
Tov Dariush Shem
Original Assignee
Univ Ben Gurion
Dan Sadot
Tov Dariush Shem
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 Univ Ben Gurion, Dan Sadot, Tov Dariush Shem filed Critical Univ Ben Gurion
Priority to AU20724/99A priority Critical patent/AU2072499A/en
Publication of WO1999039464A2 publication Critical patent/WO1999039464A2/en
Publication of WO1999039464A3 publication Critical patent/WO1999039464A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/28—Systems using multi-frequency codes with simultaneous transmission of different frequencies each representing one code element
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/501—Structural aspects
    • H04B10/503—Laser transmitters
    • H04B10/505—Laser transmitters using external modulation
    • H04B10/5055—Laser transmitters using external modulation using a pre-coder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/548—Phase or frequency modulation
    • H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
    • H04B10/5563—Digital frequency modulation
    • 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)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)

Abstract

The invention provides, in a system for effecting information security in an optical communication network, an optical data encryptor including first input means for receiving information signals to be transmitted over said communication network; a frequency-to-frequency coding means for coding the information received and for transforming the coded information into a stream of differential frequency shift keying (DFSK) signals; second input means for receiving key signals; a frequency modulation unit for receiving the DFSK stream and the key signals, for matching each signal of the DFSK stream with m key signals, and for dividing the matched stream into sets of n signals each, where m and n are positive integers; and a combiner for combining the sets, to be utilized for modulating optical transmitting means prior to effecting encrypted optical transmission over the communication network.
PCT/IL1999/000044 1998-01-29 1999-01-25 A system and a method for information security in optical communication networks WO1999039464A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU20724/99A AU2072499A (en) 1998-01-29 1999-01-25 A system and a method for information security in optical communication networks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL123107 1998-01-29
IL12310798A IL123107A (en) 1998-01-29 1998-01-29 System and method for information security in optical communication networks

Publications (2)

Publication Number Publication Date
WO1999039464A2 WO1999039464A2 (en) 1999-08-05
WO1999039464A3 true WO1999039464A3 (en) 1999-11-04

Family

ID=11071154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IL1999/000044 WO1999039464A2 (en) 1998-01-29 1999-01-25 A system and a method for information security in optical communication networks

Country Status (3)

Country Link
AU (1) AU2072499A (en)
IL (1) IL123107A (en)
WO (1) WO1999039464A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7720226B2 (en) 2002-11-19 2010-05-18 Essex Corporation Private and secure optical communication system using an optical tapped delay line

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699445A (en) * 1970-11-02 1972-10-17 Bell Telephone Labor Inc Frequency shift keyed communication system
EP0184953A1 (en) * 1984-11-16 1986-06-18 Thomson-Csf Method and device for digital information transmission using differential frequency shift keying
US4635278A (en) * 1983-09-12 1987-01-06 Sanders Associates, Inc. Autoregressive digital telecommunications system
WO1994023507A1 (en) * 1993-03-31 1994-10-13 British Telecommunications Public Limited Company Generation of optical signals with rf components

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699445A (en) * 1970-11-02 1972-10-17 Bell Telephone Labor Inc Frequency shift keyed communication system
US4635278A (en) * 1983-09-12 1987-01-06 Sanders Associates, Inc. Autoregressive digital telecommunications system
EP0184953A1 (en) * 1984-11-16 1986-06-18 Thomson-Csf Method and device for digital information transmission using differential frequency shift keying
WO1994023507A1 (en) * 1993-03-31 1994-10-13 British Telecommunications Public Limited Company Generation of optical signals with rf components

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"CHAOS-BASED LASERS MAY YIELD SECURE COMMUNICATIONS", MACHINE DESIGN, vol. 67, no. 13, 27 July 1995 (1995-07-27), CLEVELAND (US), pages 20, XP000530353 *
ISRAEL KORN ET AL: "COMBINED FREQUENCY AND DIFFERENTIAL PHASE SHIFT KEYING WITH NON -COHERENT DETECTION IN SATELLITE MOBILE CHANNEL", PROCEEDINGS OF THE GLOBAL TELECOMMUNICATIONS CONFERENCE (GLOBECOM), HOUSTON, NOV. 29 - DEC. 2, 1993, vol. 1, 29 November 1993 (1993-11-29), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 81 - 85, XP000428034 *
ORR R S: "Quasi-independent frequency hopping-a new spread spectrum multiple access technique", IEEE 1981 INTERNATIONAL CONFERENCE ON COMMUNICATIONS, DENVER, CO, USA, 14-18 JUNE 1981, 1981, New York, NY, USA, IEEE, USA, pages 76.2/1 - 6, vol.4, XP002103488 *

Also Published As

Publication number Publication date
WO1999039464A2 (en) 1999-08-05
IL123107A0 (en) 1999-03-12
IL123107A (en) 2001-05-20
AU2072499A (en) 1999-08-16

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