CA1142637A - Analog signal encrypting and decrypting system - Google Patents

Analog signal encrypting and decrypting system

Info

Publication number
CA1142637A
CA1142637A CA000350179A CA350179A CA1142637A CA 1142637 A CA1142637 A CA 1142637A CA 000350179 A CA000350179 A CA 000350179A CA 350179 A CA350179 A CA 350179A CA 1142637 A CA1142637 A CA 1142637A
Authority
CA
Canada
Prior art keywords
signal
encrypting
analog
decrypting
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.)
Expired
Application number
CA000350179A
Other languages
English (en)
French (fr)
Inventor
Charles Akrich
Jean C. Lemaire
Michel Ruiz
Michel J. Maillard
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 CA1142637A publication Critical patent/CA1142637A/en
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)
CA000350179A 1979-04-20 1980-04-18 Analog signal encrypting and decrypting system Expired CA1142637A (en)

Applications Claiming Priority (2)

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
FRPV7910092 1979-04-20

Publications (1)

Publication Number Publication Date
CA1142637A true CA1142637A (en) 1983-03-08

Family

ID=9224562

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000350179A Expired CA1142637A (en) 1979-04-20 1980-04-18 Analog signal encrypting and decrypting system

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
DE3063260D1 (en) 1983-07-07
EP0018869A1 (fr) 1980-11-12
FR2454664A1 (fr) 1980-11-14
US4302628A (en) 1981-11-24
FR2454664B1 (https=) 1983-12-30
EP0018869B1 (fr) 1983-05-18

Similar Documents

Publication Publication Date Title
US4466017A (en) Sync suppression scrambling of television signals for subscription TV
CA1167562A (en) Television system with access control
US4864614A (en) Authorising coded signals
CA1142637A (en) Analog signal encrypting and decrypting system
US3610828A (en) Privacy communication system
US3731197A (en) Secrecy communication system
CA1225735A (en) Video encryption system
CA1267218A (en) Video encryption system
US4628358A (en) Television signal encryption system with protected audio
GB823541A (en) Improvements in or relating to secrecy television systems
CA1292056C (en) Video signal scrambling system
US4636854A (en) Transmission system
US4133977A (en) Voice scrambler using syllabic masking
US4361729A (en) Narrowband analog message privacy system
US4172968A (en) Electrical system
JPS6024792A (ja) 放送方式並びにこの放送方式のための送信装置及び受信装置
US4651205A (en) Television transmission system
EP0216595A2 (en) Data encryption
JPS60154793A (ja) Ｃａｔｖシステムにおけるスクランブル方式
JP2542584B2 (ja) 加入放送システム
IE830565L (en) Audio scrambler
CA1155952A (en) Subscriber-limited reception television broadcast security encoder-decoder system
JPH01137893A (ja) 同期圧縮スクランブル装置
JPS61131639A (ja) 受信装置
JPS6089143A (ja) 秘話通信装置

Legal Events

Date Code Title Description
MKEX Expiry