FR2290800A1 - Procede pour renforcer la protection du secret lors de la transmission codee d'informations et dispositif pour la mise en oeuvre de ce procede - Google Patents

Procede pour renforcer la protection du secret lors de la transmission codee d'informations et dispositif pour la mise en oeuvre de ce procede

Info

Publication number
FR2290800A1
FR2290800A1 FR7534363A FR7534363A FR2290800A1 FR 2290800 A1 FR2290800 A1 FR 2290800A1 FR 7534363 A FR7534363 A FR 7534363A FR 7534363 A FR7534363 A FR 7534363A FR 2290800 A1 FR2290800 A1 FR 2290800A1
Authority
FR
France
Prior art keywords
signals
switching
unscrambling
receiver
control
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
FR7534363A
Other languages
English (en)
Other versions
FR2290800B3 (fr
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.)
Patelhold Patenverwertungs and Elektro-Holding AG
Original Assignee
Patelhold Patenverwertungs and Elektro-Holding 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 Patelhold Patenverwertungs and Elektro-Holding AG filed Critical Patelhold Patenverwertungs and Elektro-Holding AG
Publication of FR2290800A1 publication Critical patent/FR2290800A1/fr
Application granted granted Critical
Publication of FR2290800B3 publication Critical patent/FR2290800B3/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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Selective Calling Equipment (AREA)
FR7534363A 1974-11-05 1975-11-03 Procede pour renforcer la protection du secret lors de la transmission codee d'informations et dispositif pour la mise en oeuvre de ce procede Granted FR2290800A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1476274A CH578807A5 (fr) 1974-11-05 1974-11-05

Publications (2)

Publication Number Publication Date
FR2290800A1 true FR2290800A1 (fr) 1976-06-04
FR2290800B3 FR2290800B3 (fr) 1979-06-29

Family

ID=4403628

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7534363A Granted FR2290800A1 (fr) 1974-11-05 1975-11-03 Procede pour renforcer la protection du secret lors de la transmission codee d'informations et dispositif pour la mise en oeuvre de ce procede

Country Status (6)

Country Link
CH (1) CH578807A5 (fr)
DE (1) DE2457663C2 (fr)
FR (1) FR2290800A1 (fr)
IT (1) IT1048817B (fr)
NL (1) NL7512831A (fr)
SE (1) SE412676B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664113A1 (fr) * 1990-06-28 1992-01-03 Alcatel Transmission Procede de transmission numerique a etalement de spectre par sequence directe a changement de sequences en cours de transmission, et emetteur et recepteur le mettant en óoeuvre.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310720A (en) * 1978-03-31 1982-01-12 Pitney Bowes Inc. Computer accessing system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL63459C (fr) * 1943-04-05
CH361597A (de) * 1958-08-23 1962-04-30 Patelhold Patentverwertung Verfahren zur Verschleierung von Nachrichtensignalen
NL244086A (fr) * 1958-12-10
NL6906145A (fr) * 1968-05-15 1969-11-18
CH518658A (de) * 1970-07-07 1972-01-31 Patelhold Patentverwaltungs Un Verfahren zur verschlüsselten Nachrichtenübermittlung durch zeitliche Vertauschung von Informationselementen
CH539989A (de) * 1971-04-19 1973-07-31 Gretag Ag Verfahren und Vorrichtung zur chiffrierten Nachrichtenübermittlung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2664113A1 (fr) * 1990-06-28 1992-01-03 Alcatel Transmission Procede de transmission numerique a etalement de spectre par sequence directe a changement de sequences en cours de transmission, et emetteur et recepteur le mettant en óoeuvre.
EP0470352A1 (fr) * 1990-06-28 1992-02-12 Alcatel Telspace Procédé de transmission numérique à étalement de spectre par séquence directe à changement de séquences en cours de transmission, et émetteur et récepteur le mettant en oeuvre

Also Published As

Publication number Publication date
NL7512831A (nl) 1976-05-07
DE2457663C2 (de) 1983-11-17
CH578807A5 (fr) 1976-08-13
SE412676B (sv) 1980-03-10
DE2457663A1 (de) 1976-05-06
SE7512172L (sv) 1976-05-06
IT1048817B (it) 1980-12-20
FR2290800B3 (fr) 1979-06-29

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