DE3063260D1 - Arrangement for encrypting and decrypting an analog signal by time compressions and expansions - Google Patents

Arrangement for encrypting and decrypting an analog signal by time compressions and expansions

Info

Publication number
DE3063260D1
DE3063260D1 DE8080400476T DE3063260T DE3063260D1 DE 3063260 D1 DE3063260 D1 DE 3063260D1 DE 8080400476 T DE8080400476 T DE 8080400476T DE 3063260 T DE3063260 T DE 3063260T DE 3063260 D1 DE3063260 D1 DE 3063260D1
Authority
DE
Germany
Prior art keywords
expansions
decrypting
encrypting
arrangement
analog signal
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
DE8080400476T
Other languages
German (de)
English (en)
Inventor
Michel Maillard
Jean Lemaire
Michel Ruiz
Charles Akrich
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
Application granted granted Critical
Publication of DE3063260D1 publication Critical patent/DE3063260D1/de
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)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
DE8080400476T 1979-04-20 1980-04-09 Arrangement for encrypting and decrypting an analog signal by time compressions and expansions Expired DE3063260D1 (en)

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 (1)

Publication Number Publication Date
DE3063260D1 true DE3063260D1 (en) 1983-07-07

Family

ID=9224562

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8080400476T Expired DE3063260D1 (en) 1979-04-20 1980-04-09 Arrangement for encrypting and decrypting an analog signal by time compressions and expansions

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

Family Cites Families (10)

* 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
GB1340327A (en) * 1971-04-19 1973-12-12 Plessey Co Ltd Coding arrangements
US3846827A (en) * 1973-02-12 1974-11-05 Cambridge Res & Dev Group Speech compressor-expander with signal sample zero reset
DE2412732A1 (de) * 1974-03-16 1975-09-18 Licentia Gmbh Verfahren zum verschleiern von sprachsignalen
US3959597A (en) * 1975-04-15 1976-05-25 Keiser Bernhard E Delay line time compressor and expander
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
US4217469A (en) * 1977-03-15 1980-08-12 Emilio Martelli Coding and decoding apparatus for the protection of communication secrecy
US4100374A (en) * 1977-04-11 1978-07-11 Bell Telephone Laboratories, Incorporated Uniform permutation privacy system
DE2834281A1 (de) * 1978-08-04 1980-02-21 Siemens Ag Anordnung zur durchfuehrung einer verschleierten uebertragung von informationen

Also Published As

Publication number Publication date
EP0018869A1 (fr) 1980-11-12
FR2454664A1 (fr) 1980-11-14
CA1142637A (en) 1983-03-08
US4302628A (en) 1981-11-24
FR2454664B1 (https=) 1983-12-30
EP0018869B1 (fr) 1983-05-18

Similar Documents

Publication Publication Date Title
GB2050021B (en) Method and means for securing the distribution of encoding keys
DE3061915D1 (en) Gas injection apparatus
GB2048686B (en) Endoscopc instrumentation apparatus
ZA807971B (en) Enciphering/deciphering system
AU6410080A (en) Plural encryption
GB2052123B (en) Time recorder
JPS55104036A (en) Signal generator
DE3065011D1 (en) Apparatus for enciphering and/or deciphering data signals
GB2047999B (en) Digital waveform generating apparatus
DE3063260D1 (en) Arrangement for encrypting and decrypting an analog signal by time compressions and expansions
JPS5654366A (en) Waveform display for digital oscilloscope
GB2053619B (en) Interpolation methods and apparatus
GB2059537B (en) Coal gas treatment apparatus
GB2071298B (en) Cryogenic apparatus
AU6456880A (en) Device for visual-display of key telephone-operation symbols
GB2059827B (en) Apparatus for facing and internal turning
JPS5252655A (en) Scanning and recording system
DE3067880D1 (en) Magneto-fluidic recording apparatus
GB2005621B (en) Converyor system and carriage therefor
GB2052271B (en) Gas administration apparatus
DE2966235D1 (en) Method and device for generating secret keys
GB2053537B (en) Digital computing apparatus
JPS5691272A (en) Cryptographic technique
JPS56130903A (en) Annular magnet unit
GB2129285B (en) Comminution apparatus

Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee