FR721499A - Secret telegraph system - Google Patents

Secret telegraph system

Info

Publication number
FR721499A
FR721499A FR721499DA FR721499A FR 721499 A FR721499 A FR 721499A FR 721499D A FR721499D A FR 721499DA FR 721499 A FR721499 A FR 721499A
Authority
FR
France
Prior art keywords
telegraph system
secret
secret telegraph
telegraph
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)
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens 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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR721499A publication Critical patent/FR721499A/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)
  • Knitting Machines (AREA)
  • Lock And Its Accessories (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Storage Device Security (AREA)
FR721499D 1930-07-18 1931-07-17 Secret telegraph system Expired FR721499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE615016T 1930-07-18

Publications (1)

Publication Number Publication Date
FR721499A true FR721499A (en) 1932-03-03

Family

ID=34812891

Family Applications (1)

Application Number Title Priority Date Filing Date
FR721499D Expired FR721499A (en) 1930-07-18 1931-07-17 Secret telegraph system

Country Status (5)

Country Link
US (1) US1912983A (en)
BE (1) BE381441A (en)
DE (2) DE615016C (en)
FR (1) FR721499A (en)
GB (1) GB386676A (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE767392C (en) * 1938-05-21 1952-07-31 Lorenz A G C Process for generating and sending encrypted messages according to the start-stop system of telex technology
DE767367C (en) * 1939-05-11 1952-06-19 Lorenz A G C Encryption device for the temporal exchange of five-alphabet-impulses
DE744693C (en) * 1941-04-26 1944-01-22 Opta Radio Ag Character device with a plurality of circumferential cam disks which serve as character carriers for signaling and which directly control a common transmitter contact
US2458406A (en) * 1945-09-28 1949-01-04 Ibm Ciphering and checking device
GB680900A (en) * 1949-10-05 1952-10-15 Dennis Harold Ward Improvements in hampers for carboys and other containers
US2765364A (en) * 1950-10-05 1956-10-02 Hagelin Boris Caesar Wilhelm Keying mechanism
US2797260A (en) * 1952-01-30 1957-06-25 Zenith Radio Corp Subscription television system
BE522193A (en) * 1952-08-19
US2789159A (en) * 1953-08-18 1957-04-16 Dreyse Richard Translating device for transmitting and receiving coded messages
US4187393A (en) * 1955-08-23 1980-02-05 Deweese Eugene R Jr Key generator

Also Published As

Publication number Publication date
DE615016C (en) 1935-06-24
US1912983A (en) 1933-06-06
GB386676A (en) 1933-01-17
DE666436C (en) 1938-10-21
BE381441A (en)

Similar Documents

Publication Publication Date Title
FR721499A (en) Secret telegraph system
FR726823A (en) Excavator system
FR32851E (en) Secret telegraphy system
DK44872C (en) Bell.
FR621470A (en) Telegraph transmission system
FR713817A (en) Telegraph installation
FR731914A (en) Secret telegraphy system
FR721788A (en) Radio distribution system
CH144969A (en) Terminal device.
FR715929A (en) Interconnection telegraph system
FR699469A (en) Powerline telegraph system
FR692018A (en) Security clip
FR702194A (en) Telegraph systems
FR703575A (en) Radio-telephony and telegraph system
FR717843A (en) Transmission system
DK46770C (en) Telegraph perforator.
FR707069A (en) Connection system
FR717671A (en) Telephone systems
DK45279C (en) DC or Carrier Telegraph System.
GR2938B (en) NEW BACKGROUND SYSTEM.
FR702184A (en) Decompression system
ES121003A1 (en) Improvements in telegraphic transmission systems.
CH153056A (en) Signaling system.
FR31357E (en) Secret radiotelegraphy system
FR706214A (en) Filing system