FR2358789A1 - ENCODER SYNCHRONIZATION PROCESS FOR DATA TRANSMISSION INSTALLATIONS - Google Patents

ENCODER SYNCHRONIZATION PROCESS FOR DATA TRANSMISSION INSTALLATIONS

Info

Publication number
FR2358789A1
FR2358789A1 FR7721768A FR7721768A FR2358789A1 FR 2358789 A1 FR2358789 A1 FR 2358789A1 FR 7721768 A FR7721768 A FR 7721768A FR 7721768 A FR7721768 A FR 7721768A FR 2358789 A1 FR2358789 A1 FR 2358789A1
Authority
FR
France
Prior art keywords
identifier word
data transmission
synchronization process
receiver
transmitter
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.)
Granted
Application number
FR7721768A
Other languages
French (fr)
Other versions
FR2358789B1 (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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of FR2358789A1 publication Critical patent/FR2358789A1/en
Application granted granted Critical
Publication of FR2358789B1 publication Critical patent/FR2358789B1/fr
Granted 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Lock And Its Accessories (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

Un premier mot identificateur KW1 déclenche la transmission d'indicateurs de code de l'émetteur au récepteur, pour la programmation d'un générateur de code de réception. L'émetteur transmet un second mot identificateur codé au récepteur après l'avoir correctement diodé, transmet un troisième mot identificateur sous forme d'accusé de réception à l'émetteur, qui déclenche alors la transmission du message codé au récepteur, à l'aide d'un quatrième mot identificateur. La réception incorrecte du second, troisième ou quatrième mot identificateur produit le retour des codeurs dans une position de base, puis la répétition des opérations décrites.A first identifier word KW1 triggers the transmission of code indicators from the transmitter to the receiver, for programming a reception code generator. The transmitter transmits a second coded identifier word to the receiver after having correctly dioded it, transmits a third identifier word in the form of acknowledgment of receipt to the transmitter, which then triggers the transmission of the coded message to the receiver, using a fourth identifier word. Incorrect reception of the second, third or fourth identifier word results in the encoders returning to a home position and then repeating the operations described.

FR7721768A 1976-07-15 1977-07-13 ENCODER SYNCHRONIZATION PROCESS FOR DATA TRANSMISSION INSTALLATIONS Granted FR2358789A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2631823A DE2631823C3 (en) 1976-07-15 1976-07-15 Method for synchronizing key devices for data transmission systems

Publications (2)

Publication Number Publication Date
FR2358789A1 true FR2358789A1 (en) 1978-02-10
FR2358789B1 FR2358789B1 (en) 1985-04-05

Family

ID=5983088

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7721768A Granted FR2358789A1 (en) 1976-07-15 1977-07-13 ENCODER SYNCHRONIZATION PROCESS FOR DATA TRANSMISSION INSTALLATIONS

Country Status (7)

Country Link
AT (1) AT355635B (en)
CH (1) CH617553A5 (en)
DE (1) DE2631823C3 (en)
FR (1) FR2358789A1 (en)
GB (1) GB1532363A (en)
NL (1) NL7707323A (en)
NO (1) NO148133C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2920589C2 (en) * 1979-05-21 1981-06-11 Siemens AG, 1000 Berlin und 8000 München Method and circuit arrangement for checking the synchronism of two key devices
DE2939159C3 (en) * 1979-09-27 1982-03-25 Siemens AG, 1000 Berlin und 8000 München Method for the synchronization of key devices that are operated as part of a packet network
JPH0620228B2 (en) * 1984-03-13 1994-03-16 キヤノン株式会社 Equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153055B (en) * 1960-12-29 1963-08-22 Int Standard Electric Corp Method for the synchronization of the key strips in transmission systems for secret telegraphy
DE1216921B (en) * 1963-12-24 1966-05-18 Gretag Ag Method for synchronizing 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
FR2144439A5 (en) * 1971-06-30 1973-02-09 Ibm

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1582790A (en) * 1968-01-16 1969-10-10
DE2017282C3 (en) * 1970-04-10 1974-05-02 Siemens Ag Communication system with two-way traffic and pulse operation
US3764742A (en) * 1971-12-23 1973-10-09 Ibm Cryptographic identification system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153055B (en) * 1960-12-29 1963-08-22 Int Standard Electric Corp Method for the synchronization of the key strips in transmission systems for secret telegraphy
DE1216921B (en) * 1963-12-24 1966-05-18 Gretag Ag Method for synchronizing 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
FR2144439A5 (en) * 1971-06-30 1973-02-09 Ibm

Also Published As

Publication number Publication date
DE2631823A1 (en) 1978-01-19
GB1532363A (en) 1978-11-15
DE2631823B2 (en) 1978-05-03
FR2358789B1 (en) 1985-04-05
CH617553A5 (en) 1980-05-30
ATA500277A (en) 1979-08-15
DE2631823C3 (en) 1984-03-01
NO148133B (en) 1983-05-02
NO148133C (en) 1983-08-17
AT355635B (en) 1980-03-10
NO772469L (en) 1978-01-17
NL7707323A (en) 1978-01-17

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Legal Events

Date Code Title Description
TP Transmission of property
CD Change of name or company name
ST Notification of lapse