FR23481E - Encryption and decryption device for telegraph system - Google Patents

Encryption and decryption device for telegraph system

Info

Publication number
FR23481E
FR23481E FR23481A FR23481DA FR23481E FR 23481 E FR23481 E FR 23481E FR 23481 A FR23481 A FR 23481A FR 23481D A FR23481D A FR 23481DA FR 23481 E FR23481 E FR 23481E
Authority
FR
France
Prior art keywords
encryption
decryption device
telegraph system
telegraph
decryption
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
FR23481A
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 US265307A external-priority patent/US1356546A/en
Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR23481E publication Critical patent/FR23481E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G09C1/06—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member
    • G09C1/10—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member the connections being electrical
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Handling Of Sheets (AREA)
  • Relay Circuits (AREA)
FR23481A 1918-09-13 1920-06-25 Encryption and decryption device for telegraph system Expired FR23481E (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US146520XA 1918-09-13 1918-09-13
US265307A US1356546A (en) 1918-12-04 1918-12-04 Ciphering system
US146991XA 1918-12-09 1918-12-09

Publications (1)

Publication Number Publication Date
FR23481E true FR23481E (en) 1921-11-30

Family

ID=31721325

Family Applications (2)

Application Number Title Priority Date Filing Date
FR524197A Expired FR524197A (en) 1918-09-13 1920-06-23 Encryption and decryption device for telegraph system
FR23481A Expired FR23481E (en) 1918-09-13 1920-06-25 Encryption and decryption device for telegraph system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR524197A Expired FR524197A (en) 1918-09-13 1920-06-23 Encryption and decryption device for telegraph system

Country Status (3)

Country Link
DE (1) DE355393C (en)
FR (2) FR524197A (en)
GB (3) GB146520A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974447C (en) * 1943-05-15 1960-12-29 Normalzeit G M B H Encryption device

Also Published As

Publication number Publication date
DE355393C (en) 1922-06-26
GB146990A (en) 1921-09-08
FR524197A (en) 1921-08-31
GB146520A (en) 1921-09-29
GB146991A (en) 1921-09-22

Similar Documents

Publication Publication Date Title
FR524197A (en) Encryption and decryption device for telegraph system
FR23483E (en) Encryption and decryption device for telegraph system
FR488255A (en) Regulator and speedometer device, for phonographs
FR505646A (en) Transmission system for combined telephone and telegraph services
FR709392A (en) Device for ensuring the secrecy of news, signals, etc., transmitted by electrical means
FR528310A (en) Device for simultaneously sending signals from t. s. f. and light signals
FR433748A (en) Torpedo launching device
FR506916A (en) Adjustment system for machines and electrical devices
FR528240A (en) Duplex and diplex telegraphy system
FR503693A (en) Fixing device for lids
DK32236C (en) Apparatus for Encrypting and Decrypting Depecher and the like.
FR490216A (en) Ring device
FR504019A (en) Carrying device for aerial torpedoes
FR502707A (en) Device for adjusting the eyepieces of stereoscopic devices
FR497574A (en) Traction or tension device
FR498355A (en) Stop and repeat device for graphophones
FR511381A (en) System and device for regulating the operation of drying installations
FR980035A (en) Method and device for the encryption and decryption of messages and for the transmission of encrypted messages
CH82009A (en) Safety device for closures
FR501819A (en) Safety device for locks
FR502794A (en) Adjustable device for translating messages into cipher language and vice versa
FR474166A (en) Device for hair retention
FR491496A (en) Device for blocking and stopping the falling mass of sheep
FR535035A (en) Printing telegraph system and apparatus
FR498611A (en) Differential device for direction finding devices