CA1205540A - Systemes de brouillage de communications - Google Patents

Systemes de brouillage de communications

Info

Publication number
CA1205540A
CA1205540A CA000429393A CA429393A CA1205540A CA 1205540 A CA1205540 A CA 1205540A CA 000429393 A CA000429393 A CA 000429393A CA 429393 A CA429393 A CA 429393A CA 1205540 A CA1205540 A CA 1205540A
Authority
CA
Canada
Prior art keywords
analogue
signals
stores
coded
reorganisation
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.)
Expired
Application number
CA000429393A
Other languages
English (en)
Inventor
Kenneth Austin
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Application granted granted Critical
Publication of CA1205540A publication Critical patent/CA1205540A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
CA000429393A 1982-06-02 1983-06-01 Systemes de brouillage de communications Expired CA1205540A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8216137 1982-06-02
GB8216137 1982-06-02

Publications (1)

Publication Number Publication Date
CA1205540A true CA1205540A (fr) 1986-06-03

Family

ID=10530811

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000429393A Expired CA1205540A (fr) 1982-06-02 1983-06-01 Systemes de brouillage de communications

Country Status (2)

Country Link
EP (1) EP0095923A3 (fr)
CA (1) CA1205540A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission
SG42847A1 (en) * 1993-05-05 1997-10-17 Zunquan Liu Device and method for data encryption
CA2162125C (fr) * 1993-05-05 2005-09-20 Zunquan Liu Repertoire de mappages pour cryptosysteme
GB2288519A (en) * 1994-04-05 1995-10-18 Ibm Data encryption
DE4425158C2 (de) * 1994-07-16 2003-07-03 Deutsche Telekom Ag Verfahren und Anordnung zur Realisierung von kryptologischen Funktionen
GB2386041A (en) * 2002-03-01 2003-09-03 Sensaura Ltd A method of modifying intermittent audio signals such as speech or musical notes in real time
FR2837644A1 (fr) * 2002-10-25 2003-09-26 Canal Plus Technologies Procede de transmission securisee de messages ou de donnees entre deux entites
US20060222186A1 (en) * 2005-04-05 2006-10-05 Paige Robert F Multi-channel audio switch
ITRM20070010A1 (it) * 2007-01-09 2008-07-10 Telecomponenti S R L Metodo di elaborazione di un segnale digitale e sistema utilizzante tale metodo.
FR2927493B1 (fr) * 2008-02-08 2010-06-11 Philippe Thorel Procede et systeme de securisation de diffusion de donnees

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2307441C1 (de) * 1973-02-15 1975-05-07 Licentia Gmbh Verfahren zum Verschleiern von Sprachsignalen
FR2379947A1 (fr) * 1977-02-03 1978-09-01 Secre Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations
US4229817A (en) * 1978-04-28 1980-10-21 Datotek, Inc. Portable electronic cryptographic device
US4433211A (en) * 1981-11-04 1984-02-21 Technical Communications Corporation Privacy communication system employing time/frequency transformation

Also Published As

Publication number Publication date
EP0095923A3 (fr) 1985-08-21
EP0095923A2 (fr) 1983-12-07

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Legal Events

Date Code Title Description
MKEX Expiry