FR2454664A1 - Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles - Google Patents

Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles

Info

Publication number
FR2454664A1
FR2454664A1 FR7910092A FR7910092A FR2454664A1 FR 2454664 A1 FR2454664 A1 FR 2454664A1 FR 7910092 A FR7910092 A FR 7910092A FR 7910092 A FR7910092 A FR 7910092A FR 2454664 A1 FR2454664 A1 FR 2454664A1
Authority
FR
France
Prior art keywords
encryption
signal
samples
cryptor
predetermined period
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
FR7910092A
Other languages
English (en)
French (fr)
Other versions
FR2454664B1 (https=
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 FR7910092A priority Critical patent/FR2454664A1/fr
Priority to DE8080400476T priority patent/DE3063260D1/de
Priority to EP80400476A priority patent/EP0018869B1/fr
Priority to US06/139,675 priority patent/US4302628A/en
Priority to CA000350179A priority patent/CA1142637A/en
Publication of FR2454664A1 publication Critical patent/FR2454664A1/fr
Application granted granted Critical
Publication of FR2454664B1 publication Critical patent/FR2454664B1/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)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
FR7910092A 1979-04-20 1979-04-20 Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles Granted FR2454664A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7910092A FR2454664A1 (fr) 1979-04-20 1979-04-20 Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles
DE8080400476T DE3063260D1 (en) 1979-04-20 1980-04-09 Arrangement for encrypting and decrypting an analog signal by time compressions and expansions
EP80400476A EP0018869B1 (fr) 1979-04-20 1980-04-09 Installation de cryptage et de décryptage d'un signal analogique par compressions et expansions temporelles
US06/139,675 US4302628A (en) 1979-04-20 1980-04-14 Analog signal encrypting and decrypting system
CA000350179A CA1142637A (en) 1979-04-20 1980-04-18 Analog signal encrypting and decrypting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7910092A FR2454664A1 (fr) 1979-04-20 1979-04-20 Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles

Publications (2)

Publication Number Publication Date
FR2454664A1 true FR2454664A1 (fr) 1980-11-14
FR2454664B1 FR2454664B1 (https=) 1983-12-30

Family

ID=9224562

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7910092A Granted FR2454664A1 (fr) 1979-04-20 1979-04-20 Systeme de cryptage et de decryptage d'un signal analogique par compressions et expansions temporelles

Country Status (5)

Country Link
US (1) US4302628A (https=)
EP (1) EP0018869B1 (https=)
CA (1) CA1142637A (https=)
DE (1) DE3063260D1 (https=)
FR (1) FR2454664A1 (https=)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4392021A (en) * 1980-07-28 1983-07-05 Technical Communications Corporation Secure facsimile transmission system using time-delay modulation
US4434323A (en) 1981-06-29 1984-02-28 Motorola, Inc. Scrambler key code synchronizer
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
DE3381548D1 (de) * 1982-09-20 1990-06-13 Sanyo Electric Co Geraet zur geheimuebertragung.
GB2132860B (en) * 1982-12-21 1987-03-18 British Broadcasting Corp Conditional -access broadcast transmission
JPS59127442A (ja) * 1983-01-11 1984-07-23 Sony Corp 音声信号の秘話方式
GB2151886A (en) * 1983-12-21 1985-07-24 British Broadcasting Corp Conditional-access broadcast transmission
GB2180728A (en) * 1985-09-17 1987-04-01 Gec Avionics Data encryption using shift registers
US4893339A (en) * 1986-09-03 1990-01-09 Motorola, Inc. Secure communication system
US9853809B2 (en) 2015-03-31 2017-12-26 Board Of Regents Of The University Of Texas System Method and apparatus for hybrid encryption
DE102018110252A1 (de) * 2018-04-27 2019-10-31 Infineon Technologies Ag Transceiver, System mit Transceivern und Signal
US12126720B1 (en) 2023-03-31 2024-10-22 Signal Advance, Inc. Signal protection and retrieval by non-linear analog modulation

Citations (5)

* 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
DE2412732A1 (de) * 1974-03-16 1975-09-18 Licentia Gmbh Verfahren zum verschleiern von sprachsignalen
DE2648674A1 (de) * 1976-10-27 1978-06-15 Grube Hans Jochen Rundfunk- und/oder fernsehsystem
US4099027A (en) * 1976-01-02 1978-07-04 General Electric Company Speech scrambler
US4100374A (en) * 1977-04-11 1978-07-11 Bell Telephone Laboratories, Incorporated Uniform permutation privacy system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen
US3846827A (en) * 1973-02-12 1974-11-05 Cambridge Res & Dev Group Speech compressor-expander with signal sample zero reset
US3959597A (en) * 1975-04-15 1976-05-25 Keiser Bernhard E Delay line time compressor and expander
US4217469A (en) * 1977-03-15 1980-08-12 Emilio Martelli Coding and decoding apparatus for the protection of communication secrecy
DE2834281A1 (de) * 1978-08-04 1980-02-21 Siemens Ag Anordnung zur durchfuehrung einer verschleierten uebertragung von informationen

Patent Citations (5)

* 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
DE2412732A1 (de) * 1974-03-16 1975-09-18 Licentia Gmbh Verfahren zum verschleiern von sprachsignalen
US4099027A (en) * 1976-01-02 1978-07-04 General Electric Company Speech scrambler
DE2648674A1 (de) * 1976-10-27 1978-06-15 Grube Hans Jochen Rundfunk- und/oder fernsehsystem
US4100374A (en) * 1977-04-11 1978-07-11 Bell Telephone Laboratories, Incorporated Uniform permutation privacy system

Also Published As

Publication number Publication date
DE3063260D1 (en) 1983-07-07
EP0018869A1 (fr) 1980-11-12
CA1142637A (en) 1983-03-08
US4302628A (en) 1981-11-24
FR2454664B1 (https=) 1983-12-30
EP0018869B1 (fr) 1983-05-18

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