SE392556B - METHOD OF MASKING, SENDING, RECEIVING AND DEMASKING VOICE INFORMATION AND FACILITIES FOR IMPLEMENTING THE SET - Google Patents

METHOD OF MASKING, SENDING, RECEIVING AND DEMASKING VOICE INFORMATION AND FACILITIES FOR IMPLEMENTING THE SET

Info

Publication number
SE392556B
SE392556B SE7400265A SE7400265A SE392556B SE 392556 B SE392556 B SE 392556B SE 7400265 A SE7400265 A SE 7400265A SE 7400265 A SE7400265 A SE 7400265A SE 392556 B SE392556 B SE 392556B
Authority
SE
Sweden
Prior art keywords
demasking
masking
facilities
implementing
sending
Prior art date
Application number
SE7400265A
Other languages
Swedish (sv)
Inventor
E Brunner
P Schmid
W Stofer
Original Assignee
Gretag Ag
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 Gretag Ag filed Critical Gretag Ag
Publication of SE392556B publication Critical patent/SE392556B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
SE7400265A 1973-02-13 1974-01-09 METHOD OF MASKING, SENDING, RECEIVING AND DEMASKING VOICE INFORMATION AND FACILITIES FOR IMPLEMENTING THE SET SE392556B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH202673A CH574692A5 (en) 1973-02-13 1973-02-13

Publications (1)

Publication Number Publication Date
SE392556B true SE392556B (en) 1977-03-28

Family

ID=4224178

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7400265A SE392556B (en) 1973-02-13 1974-01-09 METHOD OF MASKING, SENDING, RECEIVING AND DEMASKING VOICE INFORMATION AND FACILITIES FOR IMPLEMENTING THE SET

Country Status (11)

Country Link
JP (1) JPS49119502A (en)
CA (1) CA1003137A (en)
CH (1) CH574692A5 (en)
DE (1) DE2318489C3 (en)
FR (1) FR2217875B1 (en)
GB (1) GB1465393A (en)
IT (1) IT1019573B (en)
NL (1) NL7401441A (en)
NO (1) NO140401C (en)
SE (1) SE392556B (en)
ZA (1) ZA74916B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2318247C3 (en) * 1973-04-11 1981-03-26 Siemens AG, 1000 Berlin und 8000 München Device for the disguised transmission of speech signals
JPS5824984B2 (en) * 1976-06-02 1983-05-24 三菱電機株式会社 Confidential device

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1620656A (en) * 1924-12-01 1927-03-15 Western Electric Co Carrier-wave signaling system
US3201517A (en) * 1944-04-12 1965-08-17 Bell Telephone Labor Inc Privacy communication system
FR977153A (en) * 1948-10-27 1951-03-28 Radio Electr Soc Fr Secret telephone communication system
FR1169671A (en) * 1957-03-08 1959-01-05 Thomson Houston Comp Francaise Improvements to telephone communications systems
CH361597A (en) * 1958-08-23 1962-04-30 Patelhold Patentverwertung Method for obfuscating message signals
US3225142A (en) * 1961-12-18 1965-12-21 Bell Telephone Labor Inc Privacy system
FR95619E (en) * 1966-05-05 1971-03-26 It Telecommunicazioni Siemens Time-allocated telephone signal transmission system.
CH499932A (en) * 1968-02-12 1970-11-30 Patelhold Patentverwertung Synchronization method for program-controlled carrier shift keying
CH518658A (en) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Process for encrypted message transmission by interchanging information elements over time
FR2129013A5 (en) * 1971-03-11 1972-10-27 Snecma

Also Published As

Publication number Publication date
IT1019573B (en) 1977-11-30
DE2318489A1 (en) 1974-08-15
CH574692A5 (en) 1976-04-15
NO740416L (en) 1974-08-14
JPS49119502A (en) 1974-11-15
NO140401B (en) 1979-05-14
CA1003137A (en) 1977-01-04
DE2318489B2 (en) 1979-05-03
NO140401C (en) 1979-08-22
FR2217875B1 (en) 1978-05-12
GB1465393A (en) 1977-02-23
FR2217875A1 (en) 1974-09-06
ZA74916B (en) 1974-12-24
NL7401441A (en) 1974-08-15
DE2318489C3 (en) 1982-12-23

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