CA957947A - Method of and apparatus for encoded communications transmission - Google Patents

Method of and apparatus for encoded communications transmission

Info

Publication number
CA957947A
CA957947A CA139,894A CA139894A CA957947A CA 957947 A CA957947 A CA 957947A CA 139894 A CA139894 A CA 139894A CA 957947 A CA957947 A CA 957947A
Authority
CA
Canada
Prior art keywords
communications transmission
encoded communications
encoded
transmission
communications
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
CA139,894A
Other languages
English (en)
Other versions
CA139894S (en
Inventor
Pierre Schmid
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.)
Gretag AG
Original Assignee
Gretag 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
Application filed by Gretag AG filed Critical Gretag AG
Application granted granted Critical
Publication of CA957947A publication Critical patent/CA957947A/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
    • H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Paper (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
CA139,894A 1971-04-19 1972-04-18 Method of and apparatus for encoded communications transmission Expired CA957947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH563571A CH539989A (de) 1971-04-19 1971-04-19 Verfahren und Vorrichtung zur chiffrierten Nachrichtenübermittlung

Publications (1)

Publication Number Publication Date
CA957947A true CA957947A (en) 1974-11-19

Family

ID=4296906

Family Applications (1)

Application Number Title Priority Date Filing Date
CA139,894A Expired CA957947A (en) 1971-04-19 1972-04-18 Method of and apparatus for encoded communications transmission

Country Status (9)

Country Link
CA (1) CA957947A (de)
CH (1) CH539989A (de)
DE (1) DE2218447C3 (de)
FR (1) FR2136503A5 (de)
GB (1) GB1388035A (de)
IT (1) IT951865B (de)
NL (1) NL7205255A (de)
NO (1) NO135226C (de)
SE (1) SE380414B (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH578807A5 (de) * 1974-11-05 1976-08-13 Patelhold Patentverwertung
CH581930A5 (de) * 1975-02-05 1976-11-15 Europ Handelsges Anst
DE2507805C1 (de) * 1975-02-24 1993-07-15 Siemens Ag Verfahren zur Einphasung von Schluesselgeraeten
DE2706421C2 (de) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten
DE2908979C3 (de) * 1979-03-08 1982-03-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur verschlüsselten Übertragung von Faksimile-Daten
US4288659A (en) * 1979-05-21 1981-09-08 Atalla Technovations Method and means for securing the distribution of encoding keys
EP0022069B1 (de) * 1979-06-08 1983-09-21 GRETAG Aktiengesellschaft Vorrichtung zur chiffrierten Übermittlung von Nachrichten
DE3003998A1 (de) * 1980-02-04 1981-09-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt System zur ver- und entschluesselung von daten
EP0101636B1 (de) * 1982-08-19 1987-04-08 BBC Aktiengesellschaft Brown, Boveri & Cie. Verfahren zum Synchronisieren der Verschlüsselung und Entschlüsselung beim Übertragen digitaler, verschlüsselter Daten und Vorrichtung zum Ausführen dieses Verfahrens
SE447859B (sv) * 1984-12-10 1986-12-15 Datakonsult I Malmo Ab Krypteringsanordning samt dekrypteringsanordning
AU601370B2 (en) * 1986-06-09 1990-09-13 Datakonsult I Malmo Ab Ciphering and deciphering device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1216921C2 (de) * 1963-12-24 1976-05-13 Gretag Ag Verfahren zur Synchronisierung der Ver- und Entschluesselung von impulsfoermigen, binaer codierten Nachrichten, bei welchem sendeseitig die Nachrichtenklarimpulse mit Schluessel-impulsen gemischt werden

Also Published As

Publication number Publication date
NO135226B (de) 1976-11-22
DE2218447C3 (de) 1981-05-14
IT951865B (it) 1973-07-10
SE380414B (sv) 1975-11-03
GB1388035A (en) 1975-03-19
CH539989A (de) 1973-07-31
DE2218447A1 (de) 1972-10-26
NL7205255A (de) 1972-10-23
NO135226C (de) 1977-03-02
FR2136503A5 (de) 1972-12-22
DE2218447B2 (de) 1980-09-11

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