GB1257584A - - Google Patents

Info

Publication number
GB1257584A
GB1257584A GB1257584DA GB1257584A GB 1257584 A GB1257584 A GB 1257584A GB 1257584D A GB1257584D A GB 1257584DA GB 1257584 A GB1257584 A GB 1257584A
Authority
GB
United Kingdom
Prior art keywords
shift register
signal
receiver
oscillator
shift
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
Other languages
English (en)
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
Priority claimed from SE06920/69A external-priority patent/SE353633B/xx
Priority claimed from SE06921/69A external-priority patent/SE354394B/xx
Application filed filed Critical
Publication of GB1257584A publication Critical patent/GB1257584A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Transmitters (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
GB1257584D 1969-05-14 1970-05-11 Expired GB1257584A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE06920/69A SE353633B (fr) 1969-05-14 1969-05-14
SE06921/69A SE354394B (fr) 1969-05-14 1969-05-14

Publications (1)

Publication Number Publication Date
GB1257584A true GB1257584A (fr) 1971-12-22

Family

ID=26654737

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1257584D Expired GB1257584A (fr) 1969-05-14 1970-05-11

Country Status (10)

Country Link
US (1) US3696207A (fr)
JP (1) JPS4932601B1 (fr)
AT (1) AT312691B (fr)
BE (1) BE750302A (fr)
CA (1) CA919321A (fr)
CH (1) CH519831A (fr)
DE (1) DE2021941A1 (fr)
FR (1) FR2047764A5 (fr)
GB (1) GB1257584A (fr)
NL (1) NL7006806A (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6612935A (fr) * 1966-09-14 1968-03-15
US3921151A (en) * 1971-06-21 1975-11-18 Patelhold Patentwerwertungs & Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train
US3808536A (en) * 1972-04-12 1974-04-30 Gen Electric Co Ltd Communication scrambler system
US3886313A (en) * 1972-09-29 1975-05-27 Datotek Voice security method and system
US3893031A (en) * 1972-11-08 1975-07-01 Boeing Co Synchronization system for voice privacy unit
US3909534A (en) * 1973-09-07 1975-09-30 Boeing Co Voice privacy unit for intercommunication systems
US4058677A (en) * 1974-04-26 1977-11-15 Lear Siegler, Inc. Sound scrambling equipment
CH607506A5 (fr) * 1976-06-01 1978-12-29 Europ Handelsges Anst
US4074079A (en) * 1976-06-02 1978-02-14 Bell Telephone Laboratories, Incorporated Coin telephone antifraud system
US4133977A (en) * 1977-02-25 1979-01-09 Lear Siegler, Inc. Voice scrambler using syllabic masking
DE2737576C1 (de) * 1977-08-22 1986-01-09 Siemens AG, 1000 Berlin und 8000 München Militaerisches Radar- oder Funk-Nachrichtenuebertragungssystem
US4228321A (en) * 1978-05-16 1980-10-14 Bell Telephone Laboratories, Incorporated Privacy transmission system with remote key control
US4268720A (en) * 1979-05-25 1981-05-19 Gte Laboratories Incorporated Scrambler speech transmission and synchronization system
US4790009A (en) * 1984-10-29 1988-12-06 Victor Company Of Japan, Ltd. Scrambler system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2401403A (en) * 1943-12-15 1946-06-04 Rca Corp Secret signaling
US3180927A (en) * 1961-09-07 1965-04-27 Itt Cryptosecure transmission system
NL6612935A (fr) * 1966-09-14 1968-03-15

Also Published As

Publication number Publication date
NL7006806A (fr) 1970-11-17
CH519831A (de) 1972-02-29
US3696207A (en) 1972-10-03
FR2047764A5 (fr) 1971-03-12
CA919321A (en) 1973-01-16
BE750302A (fr) 1970-11-12
AT312691B (de) 1974-01-10
DE2021941A1 (de) 1972-01-13
JPS4932601B1 (fr) 1974-08-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees