GB146990A - Telegraphic ciphering and deciphering mechanisms - Google Patents

Telegraphic ciphering and deciphering mechanisms

Info

Publication number
GB146990A
GB146990A GB18912/20A GB1891220A GB146990A GB 146990 A GB146990 A GB 146990A GB 18912/20 A GB18912/20 A GB 18912/20A GB 1891220 A GB1891220 A GB 1891220A GB 146990 A GB146990 A GB 146990A
Authority
GB
United Kingdom
Prior art keywords
machine
tape
ciphering
character
message
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
GB18912/20A
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.)
WESTERN ELECTRIC CO Ltd
AT&T Corp
Original Assignee
WESTERN ELECTRIC CO Ltd
Western Electric Co Inc
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 WESTERN ELECTRIC CO Ltd, Western Electric Co Inc filed Critical WESTERN ELECTRIC CO Ltd
Publication of GB146990A publication Critical patent/GB146990A/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)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Handling Of Sheets (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Relay Circuits (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

146,990. Western Electric Co., (Assignees of Morehouse, L. F.). Dec. 4, 1918, [Convention date]. Addition to 146,520, [Class 40 (iii), Telegraphs &c.]. Ciphers.-In a cipher telegraph system of the kind described in the parent Specification, two or more ciphering-machines are employed operating conjointly through a set of relays with a machine upon which the unciphered message is set up. The ciphering characters on the looped tape are different in number from those on the tape of the other machine in order to avoid repetition of the ciphering combinations set up by the two machines. A keyboard or tape machine A, Fig. 1, operated by the unciphered message controls selectively contacts 1 .. 5 connected to the terminals of selecting magnets 1<d> .. 5<d> respectively. The other terminals of the magnets 1<d> .. 5<d> are connected to the armatures 11 .. 15 of relavs 1<c> .. 5<c>. The circuits of the windings of the relays 1<c> .. 5<c> are controlled by a tape machine X through which a looped ciphering tape is run and by a tape machine Y through which a looped ciphering tape is run. The cipher characters in the tape passing through the machine X are different in number from the characters in the tape passing through the machine Y. If the character J is passing through the machine A at the same time as the character O is passing through the machine X and the character R through the machine Y the relays 1<c> .. 5<c> are operated in accordance with the character L and the magnets 1<d> .. 5<d> in accordance with the character B. When the ciphered tape is passed through a machine A simultaneously with the passage of looped ciphering tapes through the machines X and Y the message is de-ciphered. To decipher the message as it is received over the line, a line relay 41, Fig. 2, energized in accordance with the current impulses of the ciphered message operates in conjunction with a rotary distributor D to the contact segments 1<1> .. 5<1> to which the magnets. 1<d> .. 5d are connected.
GB18912/20A 1918-09-13 1920-07-06 Telegraphic ciphering and deciphering mechanisms Expired GB146990A (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
GB146990A true GB146990A (en) 1921-09-08

Family

ID=31721325

Family Applications (3)

Application Number Title Priority Date Filing Date
GB18644/20A Expired GB146520A (en) 1918-09-13 1920-07-05 Telegraphic ciphering and deciphering mechanism
GB18912/20A Expired GB146990A (en) 1918-09-13 1920-07-06 Telegraphic ciphering and deciphering mechanisms
GB18913/20A Expired GB146991A (en) 1918-09-13 1920-07-06 Telegraphic ciphering and deciphering mechanism

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB18644/20A Expired GB146520A (en) 1918-09-13 1920-07-05 Telegraphic ciphering and deciphering mechanism

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB18913/20A Expired GB146991A (en) 1918-09-13 1920-07-06 Telegraphic ciphering and deciphering mechanism

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
GB146520A (en) 1921-09-29
FR23481E (en) 1921-11-30
FR524197A (en) 1921-08-31
DE355393C (en) 1922-06-26
GB146991A (en) 1921-09-22

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