GB1364518A - Message encoding apparatus - Google Patents

Message encoding apparatus

Info

Publication number
GB1364518A
GB1364518A GB3975971A GB3975971A GB1364518A GB 1364518 A GB1364518 A GB 1364518A GB 3975971 A GB3975971 A GB 3975971A GB 3975971 A GB3975971 A GB 3975971A GB 1364518 A GB1364518 A GB 1364518A
Authority
GB
United Kingdom
Prior art keywords
time
shift registers
code
cypher
data flow
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
GB3975971A
Other languages
English (en)
Inventor
K Ehrat
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.)
Novartis AG
Original Assignee
Ciba Geigy AG
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 CH1259270A external-priority patent/CH530742A/de
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1364518A publication Critical patent/GB1364518A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Storage Device Security (AREA)
  • Mobile Radio Communication Systems (AREA)
GB3975971A 1970-08-24 1971-08-24 Message encoding apparatus Expired GB1364518A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1259270A CH530742A (de) 1970-08-24 1970-08-24 Vorrichtung zur Erzeugung von Schlüsselimpulsfolgen
CH1080771 1971-07-22

Publications (1)

Publication Number Publication Date
GB1364518A true GB1364518A (en) 1974-08-21

Family

ID=25707318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3975971A Expired GB1364518A (en) 1970-08-24 1971-08-24 Message encoding apparatus

Country Status (5)

Country Link
CA (1) CA947661A (enExample)
DE (1) DE2142413C3 (enExample)
FR (1) FR2107065A5 (enExample)
GB (1) GB1364518A (enExample)
SE (1) SE375673B (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028273B1 (de) * 1979-11-03 1983-09-28 PATELHOLD Patentverwertungs- & Elektro-Holding AG Verfahren und Einrichtung zur Erzeugung von Geheimschlüsseln
SE435979B (sv) * 1983-03-14 1984-10-29 Ericsson Telefon Ab L M Anordning for kryptering/dekryptering av digitala meddelanden
EP0146865B1 (de) * 1983-12-24 1991-02-27 ANT Nachrichtentechnik GmbH Verfahren zum Erzeugen zufallsähnlicher Binärzeichenfolgen

Also Published As

Publication number Publication date
DE2142413A1 (de) 1972-03-02
FR2107065A5 (enExample) 1972-05-05
DE2142413C3 (de) 1980-07-17
CA947661A (en) 1974-05-21
SE375673B (enExample) 1975-04-21
DE2142413B2 (de) 1979-09-27

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees
427A Application made for restoration (sect. 27/1949)
427C Application for amendment of specification now open to opposition (sect. 27/1949)
427B Order made restoring the patent (sect. 27/1949)
PCNP Patent ceased through non-payment of renewal fee