DK99080A - Fremgangsmaade til chiffreret overfoering af faksimiledata - Google Patents
Fremgangsmaade til chiffreret overfoering af faksimiledataInfo
- 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
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)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Facsimile Transmission Control (AREA)
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)
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)
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 |
-
1979
- 1979-03-08 DE DE19792908979 patent/DE2908979C3/de not_active Expired
-
1980
- 1980-03-03 EP EP19800101071 patent/EP0015534B1/de not_active Expired
- 1980-03-07 DK DK99080A patent/DK99080A/da unknown
Also Published As
Publication number | Publication date |
---|---|
DE2908979B2 (de) | 1981-07-16 |
EP0015534B1 (de) | 1983-05-18 |
EP0015534A1 (de) | 1980-09-17 |
DE2908979A1 (de) | 1980-09-11 |
DE2908979C3 (de) | 1982-03-18 |
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