DK99080A - Fremgangsmaade til chiffreret overfoering af faksimiledata - Google Patents

Fremgangsmaade til chiffreret overfoering af faksimiledata

Info

Publication number
DK99080A
DK99080A DK99080A DK99080A DK99080A DK 99080 A DK99080 A DK 99080A DK 99080 A DK99080 A DK 99080A DK 99080 A DK99080 A DK 99080A DK 99080 A DK99080 A DK 99080A
Authority
DK
Denmark
Prior art keywords
procedure
transmission data
fax transmission
changed
changed fax
Prior art date
Application number
DK99080A
Other languages
English (en)
Inventor
W Rauch
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Publication of DK99080A publication Critical patent/DK99080A/da

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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/44—Secrecy systems
    • H04N1/448—Rendering the image unintelligible, e.g. scrambling
    • H04N1/4486—Rendering the image unintelligible, e.g. scrambling using digital data encryption

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Facsimile Transmission Control (AREA)
DK99080A 1979-03-08 1980-03-07 Fremgangsmaade til chiffreret overfoering af faksimiledata DK99080A (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792908979 DE2908979C3 (de) 1979-03-08 1979-03-08 Verfahren zur verschlüsselten Übertragung von Faksimile-Daten

Publications (1)

Publication Number Publication Date
DK99080A true DK99080A (da) 1980-09-09

Family

ID=6064767

Family Applications (1)

Application Number Title Priority Date Filing Date
DK99080A DK99080A (da) 1979-03-08 1980-03-07 Fremgangsmaade til chiffreret overfoering af faksimiledata

Country Status (3)

Country Link
EP (1) EP0015534B1 (da)
DE (1) DE2908979C3 (da)
DK (1) DK99080A (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2510497B2 (ja) * 1985-10-07 1996-06-26 キヤノン株式会社 デ―タ通信システム
JP3190056B2 (ja) * 1991-03-26 2001-07-16 キヤノン株式会社 画像伝送装置、画像符号化装置、画像復号装置、及びそれらの方法
DE4439032C2 (de) * 1994-11-02 1996-09-26 Andreas Jung Verfahren und Vorrichtung zur verschlüsselten Datenübertragung
DE29501988U1 (de) * 1995-02-08 1995-04-27 Ruland Werner Ortwin Dr Med Pr Sicherheitsanordnung für Telefaxgeräte

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2690475A (en) * 1953-04-17 1954-09-28 Ii Edward R Gaul Synchronous teletypewriter mixer
DE978042C (de) * 1959-05-08 1976-10-21 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren und Vorrichtung zum Ver- und Entschlüsseln von über Faksimilegeräte zu übertragenden Informationen
NL272974A (da) * 1960-12-29
DE978013C (de) * 1961-02-20 1975-03-27 Fa. Dr.-Ing. Rudolf Hell. 2300 Kiel Verfahren und Vorrichtung zur Herstellung des Gleichlaufs der Schlüsselgeräte bei verschlüsselten Faksimileübertragungen
GB1429469A (en) * 1961-07-19 1976-03-24 Hell Rudolf Method for subsequently setting data receivers in a contrinuous transmission of encoded data transmitted in binary code form
NL6906145A (da) * 1968-05-15 1969-11-18
DE978033C (de) * 1970-05-28 1976-04-22 Fa. Dr.-Ing. Rudolf Hell, 2300 Kiel Verfahren zum Ver- und Entschlüsseln von Halbtonbildern bei der Bildtelegraphie
CH539989A (de) * 1971-04-19 1973-07-31 Gretag Ag Verfahren und Vorrichtung zur chiffrierten Nachrichtenübermittlung
GB1393920A (en) * 1972-12-12 1975-05-14 Ibm Electric digital data processing systems
DE2517073C1 (de) * 1975-04-18 1978-02-09 Siemens Ag Mit Gegenverkehr arbeitendes UEbertragungssystem
DE2706421C2 (de) * 1977-02-16 1979-03-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren zum Einstellen von Schlüsseltextgeneratoren in Chiffriergeräten

Also Published As

Publication number Publication date
DE2908979A1 (de) 1980-09-11
DE2908979C3 (de) 1982-03-18
EP0015534A1 (de) 1980-09-17
EP0015534B1 (de) 1983-05-18
DE2908979B2 (de) 1981-07-16

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