FR2449375A1 - Systeme de cryptage et de decryptage d'un signal analogique - Google Patents

Systeme de cryptage et de decryptage d'un signal analogique

Info

Publication number
FR2449375A1
FR2449375A1 FR7904038A FR7904038A FR2449375A1 FR 2449375 A1 FR2449375 A1 FR 2449375A1 FR 7904038 A FR7904038 A FR 7904038A FR 7904038 A FR7904038 A FR 7904038A FR 2449375 A1 FR2449375 A1 FR 2449375A1
Authority
FR
France
Prior art keywords
ciphering
synchronised
control unit
program control
series connected
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
FR7904038A
Other languages
English (en)
French (fr)
Other versions
FR2449375B1 (US06878557-20050412-C00065.png
Inventor
Charles Akrich
Jean Lemaire
Michel Maillard
Michel Ruiz
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Priority to FR7904038A priority Critical patent/FR2449375A1/fr
Publication of FR2449375A1 publication Critical patent/FR2449375A1/fr
Application granted granted Critical
Publication of FR2449375B1 publication Critical patent/FR2449375B1/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
FR7904038A 1979-02-16 1979-02-16 Systeme de cryptage et de decryptage d'un signal analogique Granted FR2449375A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7904038A FR2449375A1 (fr) 1979-02-16 1979-02-16 Systeme de cryptage et de decryptage d'un signal analogique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7904038A FR2449375A1 (fr) 1979-02-16 1979-02-16 Systeme de cryptage et de decryptage d'un signal analogique

Publications (2)

Publication Number Publication Date
FR2449375A1 true FR2449375A1 (fr) 1980-09-12
FR2449375B1 FR2449375B1 (US06878557-20050412-C00065.png) 1984-03-23

Family

ID=9222098

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7904038A Granted FR2449375A1 (fr) 1979-02-16 1979-02-16 Systeme de cryptage et de decryptage d'un signal analogique

Country Status (1)

Country Link
FR (1) FR2449375A1 (US06878557-20050412-C00065.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169389A1 (de) * 1984-06-29 1986-01-29 Siemens Aktiengesellschaft Verfahren zum Übertragen zweier unabhängiger Informationsarten und Anordnung zur Durchführung des Verfahrens

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1340327A (en) * 1971-04-19 1973-12-12 Plessey Co Ltd Coding arrangements
GB1397412A (en) * 1971-05-28 1975-06-11 Gen Electric Co Ltd Communication systems and apparatus for use in such systems
US4100374A (en) * 1977-04-11 1978-07-11 Bell Telephone Laboratories, Incorporated Uniform permutation privacy system
DE2820418A1 (de) * 1977-05-12 1978-11-16 Marconi Co Ltd Nachrichtensignal-verschluesselungsgeraet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1340327A (en) * 1971-04-19 1973-12-12 Plessey Co Ltd Coding arrangements
GB1397412A (en) * 1971-05-28 1975-06-11 Gen Electric Co Ltd Communication systems and apparatus for use in such systems
US4100374A (en) * 1977-04-11 1978-07-11 Bell Telephone Laboratories, Incorporated Uniform permutation privacy system
DE2820418A1 (de) * 1977-05-12 1978-11-16 Marconi Co Ltd Nachrichtensignal-verschluesselungsgeraet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0169389A1 (de) * 1984-06-29 1986-01-29 Siemens Aktiengesellschaft Verfahren zum Übertragen zweier unabhängiger Informationsarten und Anordnung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
FR2449375B1 (US06878557-20050412-C00065.png) 1984-03-23

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Legal Events

Date Code Title Description
ST Notification of lapse