GB1008390A - Improvements in electrical generators of signals which represent a quasi random sequence of symbols - Google Patents

Improvements in electrical generators of signals which represent a quasi random sequence of symbols

Info

Publication number
GB1008390A
GB1008390A GB20117/62A GB2011762A GB1008390A GB 1008390 A GB1008390 A GB 1008390A GB 20117/62 A GB20117/62 A GB 20117/62A GB 2011762 A GB2011762 A GB 2011762A GB 1008390 A GB1008390 A GB 1008390A
Authority
GB
United Kingdom
Prior art keywords
feed
gates
outputs
represent
quasi
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
GB20117/62A
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
CSF Compagnie Generale de Telegraphie sans Fil SA
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 FR863278A external-priority patent/FR1298405A/en
Priority claimed from FR864106A external-priority patent/FR79913E/en
Priority claimed from FR865316A external-priority patent/FR1302480A/en
Application filed by CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1008390A publication Critical patent/GB1008390A/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
    • G06F7/582—Pseudo-random number generators
    • 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
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computational Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Manipulation Of Pulses (AREA)
  • Lock And Its Accessories (AREA)

Abstract

1,008,390. Quasi-random numbers. C.S.F. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. May 25, 1962 [May 30, 1961; June 7, 1961; June 19, 1961], No. 20117/62. Heading G4D. A circuit for generating a quasi-random number, which may be added to a cryptographic signal of digital type and subsequently subtracted, comprises binary counters and logic circuits. The prior art is represented by Specifications 924,382 and 954,313. Stages 5-8 of a clock-pulse generator emit pulse patterns as shown. The pulses from 5 feed cascade counters 1-4 of different capacities, some or all the outputs of which feed decoders 10-13 connected to permutators 14-17. The permutated outputs arranged in sets of four feed OR gates 18-33, only some of which are connected to AND gates 38-49, which are controlled also by stages 6-8 of the clockpulse generator. The AND gates are crossconnected to auxiliary counters 34-37 the outputs of which may represent the quasirandom number or may feed a further network.
GB20117/62A 1961-05-30 1962-05-25 Improvements in electrical generators of signals which represent a quasi random sequence of symbols Expired GB1008390A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR863278A FR1298405A (en) 1961-05-30 1961-05-30 Device for reducing the number of key digits of a key generator for cryptographic apparatus
FR864106A FR79913E (en) 1960-08-02 1961-06-07 Electric generator of quasi-random symbols
FR865316A FR1302480A (en) 1961-06-19 1961-06-19 Electronic key generator with equiprobable outputs

Publications (1)

Publication Number Publication Date
GB1008390A true GB1008390A (en) 1965-10-27

Family

ID=27246032

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20117/62A Expired GB1008390A (en) 1961-05-30 1962-05-25 Improvements in electrical generators of signals which represent a quasi random sequence of symbols

Country Status (4)

Country Link
BE (1) BE617949A (en)
CH (1) CH433437A (en)
GB (1) GB1008390A (en)
SE (1) SE307159B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3365387A (en) * 1966-04-29 1968-01-23 Exxon Research Engineering Co Off-stream decoking of a minor portion of on-stream thermal cracking tubes
DE1562010C1 (en) * 1968-02-22 1994-07-28 Siemens Ag Method and device for forming key bit sequences

Also Published As

Publication number Publication date
SE307159B (en) 1968-12-23
BE617949A (en) 1962-09-17
CH433437A (en) 1967-04-15

Similar Documents

Publication Publication Date Title
GB1167272A (en) Improvement to Key Generators for Cryptographic Devices
GB1190809A (en) Improvements in and relating to the Generation of a Pulse Code
US3569955A (en) Method and devices for converting coded binary signals into multilevel signals and for reconverting the latter into the former
GB1236961A (en) Improvements in or relating to electric impulse transmitters
GB1107914A (en) Pulse detector circuit
GB1087860A (en) Improvements in or relating to pulse transmission apparatus
GB1008390A (en) Improvements in electrical generators of signals which represent a quasi random sequence of symbols
GB873277A (en) Method for scrambling communication signals
GB1281537A (en) Word pulse generating devices
GB954313A (en) Improvements in electrical generators of quasi-random symbols
GB1485700A (en) Programmable threshold gate
US3250855A (en) Electrical generators of quasi random digits
GB1269379A (en) A pcm transmission system
GB806869A (en) Pulse coding system
US3399273A (en) Ciphering system
US4179663A (en) Devices for generating pseudo-random sequences
GB996433A (en) Data transmission systems
US3233121A (en) Low noise switching circuits
GB932502A (en) Number comparing systems
GB1278346A (en) Arrangement for generating a series of digital signals
GB1007951A (en) Improvements in or relating to signal amplitude coders
GB1236535A (en) Gate circuit for electronic musical instruments
GB1122725A (en) Electrical circuit having an inductive load
GB1040193A (en) Read-only memory system
GB1227233A (en)