FR684136A - Telegraph apparatus for secret telegraphy - Google Patents

Telegraph apparatus for secret telegraphy

Info

Publication number
FR684136A
FR684136A FR684136DA FR684136A FR 684136 A FR684136 A FR 684136A FR 684136D A FR684136D A FR 684136DA FR 684136 A FR684136 A FR 684136A
Authority
FR
France
Prior art keywords
telegraphy
secret
telegraph apparatus
telegraph
secret telegraphy
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
Richard Michel
Richard Dreyse
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 FR684136A publication Critical patent/FR684136A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/38—Encryption being effected by mechanical apparatus, e.g. rotating cams, switches, keytape punchers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR684136D 1929-10-08 1929-10-08 Telegraph apparatus for secret telegraphy Expired FR684136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR684136T 1929-10-08

Publications (1)

Publication Number Publication Date
FR684136A true FR684136A (en) 1930-06-21

Family

ID=9024294

Family Applications (1)

Application Number Title Priority Date Filing Date
FR684136D Expired FR684136A (en) 1929-10-08 1929-10-08 Telegraph apparatus for secret telegraphy

Country Status (1)

Country Link
FR (1) FR684136A (en)

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