FR2379947A1 - Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations - Google Patents

Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations

Info

Publication number
FR2379947A1
FR2379947A1 FR7703069A FR7703069A FR2379947A1 FR 2379947 A1 FR2379947 A1 FR 2379947A1 FR 7703069 A FR7703069 A FR 7703069A FR 7703069 A FR7703069 A FR 7703069A FR 2379947 A1 FR2379947 A1 FR 2379947A1
Authority
FR
France
Prior art keywords
multiplexed
data
time division
time delay
new sequence
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.)
Granted
Application number
FR7703069A
Other languages
English (en)
Other versions
FR2379947B1 (fr
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.)
SECRE
Original Assignee
SECRE
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 SECRE filed Critical SECRE
Priority to FR7703069A priority Critical patent/FR2379947A1/fr
Publication of FR2379947A1 publication Critical patent/FR2379947A1/fr
Application granted granted Critical
Publication of FR2379947B1 publication Critical patent/FR2379947B1/fr
Granted 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif de brouillage permettant la discrétion dans la transmission d'informations. Elle consiste à effectuer, pour l'émission, une partition dans le temps du signal à coder en des tronçons et en des segments, à mémoriser successivement chacun des tronçons dans une mémoire, à lire successivement chacun des tronçons, et à transmettre le signal codé résultant de cette lecture. Elle consiste en vue de la reception : à effectuer sur le signal codé une partition dans le temps en des tronçons et en des segments correspondant à ceux de l'émission, à mettre en mémoire ces tronçons, puis à lire chacun des tronçons en prenant chacun desdits segments. L'invention s'applique notamment à la transmission de la parole par liaison filiaire ou hertzienne.
FR7703069A 1977-02-03 1977-02-03 Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations Granted FR2379947A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7703069A FR2379947A1 (fr) 1977-02-03 1977-02-03 Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7703069A FR2379947A1 (fr) 1977-02-03 1977-02-03 Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations

Publications (2)

Publication Number Publication Date
FR2379947A1 true FR2379947A1 (fr) 1978-09-01
FR2379947B1 FR2379947B1 (fr) 1979-09-07

Family

ID=9186266

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7703069A Granted FR2379947A1 (fr) 1977-02-03 1977-02-03 Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations

Country Status (1)

Country Link
FR (1) FR2379947A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486680A1 (fr) * 1980-07-11 1982-01-15 Trt Telecom Radio Electr Procede et dispositif de permutation des elements d'un ensemble
EP0095923A2 (fr) * 1982-06-02 1983-12-07 THE PLESSEY COMPANY plc Systèmes de brouillage de communications
EP0108151A1 (fr) * 1982-05-17 1984-05-16 Sony Corporation Cryptophone
EP0208817A1 (fr) * 1985-07-17 1987-01-21 Pilkington A.E.P. Limited Système de communication
EP0206821A3 (en) * 1985-06-28 1988-03-30 Sony Corporation Data transmission system
FR2606237A1 (fr) * 1986-10-31 1988-05-06 Trt Telecom Radio Electr Dispositif de cryptophonie analogique a permutations dynamiques de bande
US5008935A (en) * 1989-06-30 1991-04-16 At&T Bell Laboratories Efficient method for encrypting superblocks of data

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240057A1 (de) * 1972-08-16 1974-02-28 Licentia Gmbh Verfahren zur verwuerfelung von nachrichten

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2240057A1 (de) * 1972-08-16 1974-02-28 Licentia Gmbh Verfahren zur verwuerfelung von nachrichten

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2486680A1 (fr) * 1980-07-11 1982-01-15 Trt Telecom Radio Electr Procede et dispositif de permutation des elements d'un ensemble
EP0108151A1 (fr) * 1982-05-17 1984-05-16 Sony Corporation Cryptophone
EP0108151A4 (fr) * 1982-05-17 1984-09-19 Sony Corp Cryptophone.
EP0095923A2 (fr) * 1982-06-02 1983-12-07 THE PLESSEY COMPANY plc Systèmes de brouillage de communications
EP0095923A3 (fr) * 1982-06-02 1985-08-21 THE PLESSEY COMPANY plc Systèmes de brouillage de communications
EP0206821A3 (en) * 1985-06-28 1988-03-30 Sony Corporation Data transmission system
EP0208817A1 (fr) * 1985-07-17 1987-01-21 Pilkington A.E.P. Limited Système de communication
FR2606237A1 (fr) * 1986-10-31 1988-05-06 Trt Telecom Radio Electr Dispositif de cryptophonie analogique a permutations dynamiques de bande
EP0270147A1 (fr) * 1986-10-31 1988-06-08 Thomson-Trt Defense Dispositif de cryptophonie analogique à permutations dynamiques de bande
US5008935A (en) * 1989-06-30 1991-04-16 At&T Bell Laboratories Efficient method for encrypting superblocks of data

Also Published As

Publication number Publication date
FR2379947B1 (fr) 1979-09-07

Similar Documents

Publication Publication Date Title
CA2031054A1 (fr) Methode de multiplexage et de demultiplexage a inversion
DE3688786D1 (de) Apparat und zugehoeriges verfahren fuer das konvertieren von signalen mit einem seriendatenmuster, uebertragen oder geeignet fuer eine uebertragung ueber ein synchrones serienuebertragungsmittel mit hoher informationsgeschwindigkeit in ausgangssignale mit einem parallelmuster.
CA2031055A1 (fr) Methodes de multiplexage programmables pour mettre en corresponsance un domaine de capacite et un domaine temporel a l'interieur d'un bloc
GB1353217A (en) Information transmission systems
EP0208939A3 (fr) Circuit arithmétique pour calculer des valeurs absolues de différences
AU519020B2 (en) Method of extracting gallium
DE3673289D1 (de) Signalkodierung.
FR2379947A1 (fr) Procede et dispositif de brouillage permettant la discretion dans la transmission d'informations
GB2003352B (en) Optically coupled bias circuit for complementary output circuit and method
JPS5639694A (en) Method and device for synchrnonizing timing in transmission of digital information signal
EP0144989A3 (fr) Méthode et dispositif d'élimination du bruit présent dans un signal électrique alternatif
EP0314356A3 (fr) Système de codage par prédiction
GB1383168A (en) Receiver for a data transmission system
DE3882114D1 (de) Verfahren zur uebertragung eines digitalsignals.
ATE43463T1 (de) Uebertragungsverfahren fuer ein digitalsignalmultiplexger|t.
GB2007942A (en) Improvements in or relating to the switching of digital signals
AU6063180A (en) Circuit for separating clock + data signals
NL6513421A (nl) Stelsel voor de overdracht van synthetische spraak
JPS5630339A (en) Frame synchronization system of multiplexer
SU767826A1 (ru) Устройство дл многоканальной магнитной записи фазоманипулированных сигналов
JPS56122295A (en) Time slot converting device
JPS6441336A (en) Submarine optical transmission system
JPS55104159A (en) Digital signal transmission system
JPS5552625A (en) Charge transfer type transversal filter
EP0046020A3 (fr) Enregistrement de données

Legal Events

Date Code Title Description
ST Notification of lapse