GB784384A - Electronic apparatus for producing cipher key tape for printing telegraphy - Google Patents

Electronic apparatus for producing cipher key tape for printing telegraphy

Info

Publication number
GB784384A
GB784384A GB660756A GB660756A GB784384A GB 784384 A GB784384 A GB 784384A GB 660756 A GB660756 A GB 660756A GB 660756 A GB660756 A GB 660756A GB 784384 A GB784384 A GB 784384A
Authority
GB
United Kingdom
Prior art keywords
flop
pulses
code
signals
reperforator
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
GB660756A
Inventor
Bjorn Arnold Rorholt
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.)
Nexans Norway AS
Original Assignee
Standard Telefon OG Kabelfabrik AS
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 Standard Telefon OG Kabelfabrik AS filed Critical Standard Telefon OG Kabelfabrik AS
Publication of GB784384A publication Critical patent/GB784384A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/58—Random or pseudo-random number generators
    • G06F7/588—Random number generators, i.e. based on natural stochastic processes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C3/00—Typewriters for ciphering or deciphering cryptographic text
    • G09C3/04—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, by a coding or key member
    • G09C3/08—Typewriters for ciphering or deciphering cryptographic text wherein the operative connections between the keys and the type-bars are automatically and continuously permuted, during operation, 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
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/26—Testing cryptographic entity, e.g. testing integrity of encryption key or encryption algorithm

Landscapes

  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Optimization (AREA)
  • Signal Processing (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Selective Calling Equipment (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

784,384. Code telegraphy. STANDARD TELEFON OG KABELFABRIK AKTIESELSKAP. March 2, 1956, No. 6607/56. Class 40 (3). In an electronic arrangement for the production of a sequence of random signals for ciphering telegraph signals, pulses produced by a suitable noise source, such as a Geiger Muller tube GMT associated with a radio-active source RS, are applied via a valve V1 and a symmetrical flip-flop circuit formed by a double triode V4 to a mixing circuit comprising pentodes V5, V6 fed with pulses A, corresponding to the beginnings of the code elements, from a generator 4, and the random code elements of correct length occurring in the output of the mixing circuit are applied to one of the grids of the flop-flop V9 constituted by a double triode valve, to which pulses B, C corresponding respectively to the beginning of the start and stop elements are also applied via rectifiers V10, V11 from the generator 4. The output of the flipflop V9 is applied to a triode V12 or V13 operating a relay R controlling at contacts r1, r2 the input to a reperforator 7, which may be associated with a discriminating circuit eliminating code signals other than those representing the letters A . . . Z. A counter device may be associated with the reperforator 7 so that groups of perforations corresponding to five letters are produced on the cipher strip.
GB660756A 1954-01-18 1956-03-02 Electronic apparatus for producing cipher key tape for printing telegraphy Expired GB784384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO784751X 1954-01-18

Publications (1)

Publication Number Publication Date
GB784384A true GB784384A (en) 1957-10-09

Family

ID=42799816

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1558/55A Expired GB784751A (en) 1954-01-18 1955-01-18 Check circuit for electronic ciphering arrangement for teleprinter signals
GB1557/55A Expired GB784530A (en) 1954-01-18 1955-01-18 Electronic arrangement for ciphering and deciphering teleprinter signals
GB660756A Expired GB784384A (en) 1954-01-18 1956-03-02 Electronic apparatus for producing cipher key tape for printing telegraphy

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB1558/55A Expired GB784751A (en) 1954-01-18 1955-01-18 Check circuit for electronic ciphering arrangement for teleprinter signals
GB1557/55A Expired GB784530A (en) 1954-01-18 1955-01-18 Electronic arrangement for ciphering and deciphering teleprinter signals

Country Status (4)

Country Link
DE (2) DE1018452B (en)
FR (5) FR68606E (en)
GB (3) GB784751A (en)
NL (1) NL195359A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156847B (en) * 1959-12-22 1963-11-07 Prec Mecanique Labinal Coding device with a code converter for coded radio signals
DE1574931B1 (en) * 1963-10-18 1971-03-04 Int Standard Electric Corp METHOD OF MONITORING A PUNCHED STRIP IN TRANSPORT

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1000832A (en) * 1949-11-23 1952-02-18 Electronique & Automatisme Sa Operator circuits for coded electrical signals
DE855876C (en) * 1951-01-03 1952-11-17 Rudolf Dr-Ing Hell Arrangement for secret telegraphic message transmission by means of Hellschreiber

Also Published As

Publication number Publication date
NL195359A (en)
GB784751A (en) 1957-10-16
FR76696E (en) 1961-11-17
GB784530A (en) 1957-10-09
FR1124016A (en) 1956-10-02
DE1017646B (en) 1957-10-17
FR68606E (en) 1958-05-05
FR69910E (en) 1959-01-09
DE1018452B (en) 1957-10-31
FR70167E (en) 1959-02-19

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