GB1361850A - Random digital code generator - Google Patents

Random digital code generator

Info

Publication number
GB1361850A
GB1361850A GB4872371A GB4872371A GB1361850A GB 1361850 A GB1361850 A GB 1361850A GB 4872371 A GB4872371 A GB 4872371A GB 4872371 A GB4872371 A GB 4872371A GB 1361850 A GB1361850 A GB 1361850A
Authority
GB
United Kingdom
Prior art keywords
register
registers
mode
gate
random
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
GB4872371A
Other languages
English (en)
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.)
Datotek Inc
Original Assignee
Datotek 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
Application filed by Datotek Inc filed Critical Datotek Inc
Publication of GB1361850A publication Critical patent/GB1361850A/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
    • H04L9/06—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
    • H04L9/0668—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 producing a non-linear pseudorandom sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Communication Control (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Synchronizing For Television (AREA)
GB4872371A 1971-04-15 1971-10-20 Random digital code generator Expired GB1361850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13432071A 1971-04-15 1971-04-15

Publications (1)

Publication Number Publication Date
GB1361850A true GB1361850A (en) 1974-07-30

Family

ID=22462819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4872371A Expired GB1361850A (en) 1971-04-15 1971-10-20 Random digital code generator

Country Status (9)

Country Link
US (1) US3781473A (enExample)
CA (1) CA950360A (enExample)
CH (1) CH572688A5 (enExample)
DE (1) DE2154019C3 (enExample)
FR (1) FR2133395A5 (enExample)
GB (1) GB1361850A (enExample)
IT (1) IT939641B (enExample)
NL (1) NL7115278A (enExample)
NO (1) NO142797C (enExample)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004089A (en) * 1975-02-28 1977-01-18 Ncr Corporation Programmable cryptic device for enciphering and deciphering data
US4166922A (en) * 1975-04-14 1979-09-04 Datotek, Inc. Multi-mode digital enciphering system with repeated priming sequences
US4133974A (en) * 1976-11-05 1979-01-09 Datotek, Inc. System for locally enciphering prime data
DE2706421C2 (de) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten
US4202051A (en) * 1977-10-03 1980-05-06 Wisconsin Alumni Research Foundation Digital data enciphering and deciphering circuit and method
FR2477344B1 (fr) * 1980-03-03 1986-09-19 Bull Sa Procede et systeme de transmission d'informations confidentielles
US5428686A (en) * 1981-09-28 1995-06-27 The United States Of America As Represented By The Direrctor Of The National Security Agency Secure communication system having long-term keying variable
JPS59501388A (ja) * 1982-07-15 1984-08-02 ライト・シグネイチヤ−ズ，インコ−ポ−レテツド 安全システム
US4688257A (en) * 1984-07-17 1987-08-18 General Electric Company Secure wireless communication system utilizing locally synchronized noise signals
DE3687671D1 (de) 1985-06-07 1993-03-18 Siemens Ag Verfahren und anordnung zur sicherung des zugriffs zu einer rechenanlage.
US4802217A (en) * 1985-06-07 1989-01-31 Siemens Corporate Research & Support, Inc. Method and apparatus for securing access to a computer facility
US4860353A (en) * 1988-05-17 1989-08-22 General Instrument Corporation Dynamic feedback arrangement scrambling technique keystream generator
SE470242B (sv) * 1992-05-12 1993-12-13 Ericsson Telefon Ab L M Anordning för generering av slumptal
US5297207A (en) * 1993-05-24 1994-03-22 Degele Steven T Machine generation of cryptographic keys by non-linear processes similar to processes normally associated with encryption of data

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL109840C (enExample) * 1957-02-26
CH402937A (de) * 1961-08-18 1965-11-30 Gretag Ag Verfahren zur Verschlüsselung von impulsförmig übertragenen Nachrichten
US3506783A (en) * 1966-06-17 1970-04-14 Int Standard Electric Corp Key material generator

Also Published As

Publication number Publication date
IT939641B (it) 1973-02-10
NL7115278A (enExample) 1972-10-17
FR2133395A5 (enExample) 1972-11-24
CH572688A5 (enExample) 1976-02-13
DE2154019A1 (de) 1972-11-09
CA950360A (en) 1974-07-02
US3781473A (en) 1973-12-25
NO142797C (no) 1980-10-15
DE2154019B2 (de) 1981-02-26
DE2154019C3 (de) 1981-12-10
NO142797B (no) 1980-07-07

Similar Documents

Publication Publication Date Title
GB1361850A (en) Random digital code generator
GB1155456A (en) Scrambling of Digital Data Signal Patterns
US3504287A (en) Circuits for stuffing synch,fill and deviation words to ensure data link operation at designed bit rate
ES341954A1 (es) Unidad de cifrado.
GB1300165A (en) Character synchronizer
GB1507261A (en) Error-detecting data transmission system
GB1476251A (en) Multiplexed data modem
GB1396923A (en) Data communication system
EP0386908B1 (en) PCM communication system
US4225752A (en) High speed, low noise digital data communication system
CA1092242A (en) Method and apparatus for digital data transmission in television receiver remote control systems
GB996433A (en) Data transmission systems
GB1321435A (en) Teleprinter communication system
US4071693A (en) Method and apparatus for synchronizing a receiver end-key generator with a transmitter end-key generator
US4333176A (en) Data extraction means for use in a data transmission system
US3562433A (en) Digital speech plus telegraph system
US3505470A (en) Process and device for coding and decoding digital signals via phase modulation
US3407389A (en) Input buffer
US5072446A (en) Pcm communication system
GB1348092A (en) Data communication system
JPS58170117A (ja) 直列並列・並列直列変換回路
WO1993001578A1 (en) Ciphering device
US3968324A (en) Circuit arrangement for synchronizing the letters/figures levels of several input and output devices in teleprinters
GB1066909A (en) Improvements in or relating to electrical signalling systems
SU578648A1 (ru) Устройство передачи информации

Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee