FR893890A - Secret telephony method and device - Google Patents

Secret telephony method and device

Info

Publication number
FR893890A
FR893890A FR893890DA FR893890A FR 893890 A FR893890 A FR 893890A FR 893890D A FR893890D A FR 893890DA FR 893890 A FR893890 A FR 893890A
Authority
FR
France
Prior art keywords
secret telephony
telephony method
secret
telephony
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
French (fr)
Inventor
Gaston Frey
Leonid Gabrilovitch
Stanislas Petit
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 filed Critical
Application granted granted Critical
Publication of FR893890A publication Critical patent/FR893890A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR893890D 1940-02-16 1940-02-16 Secret telephony method and device Expired FR893890A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR893890T 1940-02-16

Publications (1)

Publication Number Publication Date
FR893890A true FR893890A (en) 1944-11-08

Family

ID=9390396

Family Applications (1)

Application Number Title Priority Date Filing Date
FR893890D Expired FR893890A (en) 1940-02-16 1940-02-16 Secret telephony method and device

Country Status (1)

Country Link
FR (1) FR893890A (en)

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