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 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 (en) 1971-04-19 1971-04-19 Method and device for encrypted message transmission

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 (en)
CH (1) CH539989A (en)
DE (1) DE2218447C3 (en)
FR (1) FR2136503A5 (en)
GB (1) GB1388035A (en)
IT (1) IT951865B (en)
NL (1) NL7205255A (en)
NO (1) NO135226C (en)
SE (1) SE380414B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH578807A5 (en) * 1974-11-05 1976-08-13 Patelhold Patentverwertung
CH581930A5 (en) * 1975-02-05 1976-11-15 Europ Handelsges Anst
DE2507805C1 (en) * 1975-02-24 1993-07-15 Siemens Ag Procedure for the phasing in of key devices
DE2706421C2 (en) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Procedure for setting ciphertext generators in encryption devices
DE2908979C3 (en) * 1979-03-08 1982-03-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Process for encrypted transmission of facsimile data
US4288659A (en) * 1979-05-21 1981-09-08 Atalla Technovations Method and means for securing the distribution of encoding keys
EP0022069B1 (en) * 1979-06-08 1983-09-21 GRETAG Aktiengesellschaft Apparatus for enciphered transmission of messages
DE3003998A1 (en) * 1980-02-04 1981-09-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt DATA ENCRYPTION AND DECRYLING SYSTEM
EP0101636B1 (en) * 1982-08-19 1987-04-08 BBC Aktiengesellschaft Brown, Boveri & Cie. Method of synchronising encryption and decryption during the transmission of digital encrypted data, and apparatus for carrying out said method
SE447859B (en) * 1984-12-10 1986-12-15 Datakonsult I Malmo Ab Encoding and decoding appts.
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 (en) * 1963-12-24 1976-05-13 Gretag Ag Method for the synchronization of the encryption and decryption of impulse-shaped, binary coded messages, in which the message clear pulses are mixed with key pulses on the sending side

Also Published As

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

Similar Documents

Publication Publication Date Title
CA992613A (en) Data transmission method and apparatus
CA1015831A (en) Receiver method and apparatus
CA991035A (en) Methods of and apparatus for manufacturing waterproof cable
CA1018019A (en) Methods of and apparatus for manufacturing waterproof cable
CA1028075A (en) Method and apparatus for the secret transmission of speech signals
CA932178A (en) Power transmission belt and apparatus for and method of making same
CA956891A (en) Method and apparatus for encoded message transmission
CA957947A (en) Method of and apparatus for encoded communications transmission
CA973463A (en) Method of making power transmission belts
CA964132A (en) Apparatus and method
AU475874B2 (en) Method of and apparatus for producing tampons
CA955841A (en) Pipe insulating method and apparatus
CA952938A (en) Hydraulic connector actuating apparatus and method
CA946269A (en) Method and apparatus for quenching pipes
CA954338A (en) Power transmission belt and method of making same
CA944518A (en) Apparatus for and method of making power transmission belts
CA974066A (en) Direct reduction apparatus and method
CA1019804A (en) Receiver method and apparatus
CA869368A (en) Forming method and apparatus
CA866436A (en) Data transmission apparatus and methods
CA866731A (en) Apparatus and method for making laminated cable sheath
CA878521A (en) Method and apparatus for rendering
CA861727A (en) Method and apparatus for making electrographs
CA884005A (en) Method and apparatus for making electrographs
CA871422A (en) Multiconductor cable and method and apparatus for making same