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EP0136681A3 - - Google Patents

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Publication number
EP0136681A3
EP0136681A3 EP84111665A EP84111665A EP0136681A3 EP 0136681 A3 EP0136681 A3 EP 0136681A3 EP 84111665 A EP84111665 A EP 84111665A EP 84111665 A EP84111665 A EP 84111665A EP 0136681 A3 EP0136681 A3 EP 0136681A3
Authority
EP
European Patent Office
Prior art keywords
transmission side
code
transmitter
transmission
terminal
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
EP84111665A
Other versions
EP0136681B1 (en
EP0136681A2 (en
Inventor
Ludwig Dipl.-Ing. Hofmann
Klaus Stadler
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.)
Siemens AG
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
Priority to AT84111665T priority Critical patent/ATE35754T1/en
Publication of EP0136681A2 publication Critical patent/EP0136681A2/en
Publication of EP0136681A3 publication Critical patent/EP0136681A3/xx
Application granted granted Critical
Publication of EP0136681B1 publication Critical patent/EP0136681B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)
  • Telephonic Communication Services (AREA)

Abstract

1. Method for the coded transmission of messages in transmission systems having permanently stationary and/or mobile subscriber units (terminals), for example in telephone, car telephone or radio networks, in which method a transmitter (4) for an individual subscriber code is arranged in the terminal of one transmission side and an analyser (8) is arranged in the other transmission side which is constructed as central station and is only accessible from the exchange side and in which method, in a first method step, the subscriber number is transmitted from the transmission side containing the transmitter (4) to the other transmission side, the subscriber code is determined in the latter and the receiver is set in accordance with the code and in which method, thereafter, in a second method step, the transmission path is switched through to the transmit section in the terminal containing the transmitter (4), for transmitting the coded useful signal, characterized by a hierarchical structure, in such a manner that several terminals are in each case connected to a centre in the networks and the code signalling from the terminal to the central unit occurs in a non system-compatible sequence, and also in that, in the first method step, the code set is transmitted from the transmission side containing the transmitter (4) to the other transmission side constructed as central station.
EP84111665A 1983-09-30 1984-09-28 Method for encrypted information transmission Expired EP0136681B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111665T ATE35754T1 (en) 1983-09-30 1984-09-28 METHOD OF ENCRYPTED MESSAGE TRANSMISSION.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833335672 DE3335672A1 (en) 1983-09-30 1983-09-30 ENCRYPTED MESSAGE TRANSMISSION METHOD
DE3335672 1983-09-30

Publications (3)

Publication Number Publication Date
EP0136681A2 EP0136681A2 (en) 1985-04-10
EP0136681A3 true EP0136681A3 (en) 1985-06-05
EP0136681B1 EP0136681B1 (en) 1988-07-13

Family

ID=6210671

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111665A Expired EP0136681B1 (en) 1983-09-30 1984-09-28 Method for encrypted information transmission

Country Status (3)

Country Link
EP (1) EP0136681B1 (en)
AT (1) ATE35754T1 (en)
DE (2) DE3335672A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT393339B (en) * 1987-10-21 1991-09-25 Siemens Ag Oesterreich Apparatus for the scrambled transmission of analogue signals
EP1223506B1 (en) * 2001-01-16 2006-12-13 Telefonaktiebolaget LM Ericsson (publ) Random number generator using compression
WO2002056170A1 (en) * 2001-01-16 2002-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Random number generator using compression

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2659622B1 (en) * 1976-12-30 1978-05-11 Siemens Ag Radiotelephony system
DE2722700A1 (en) * 1973-07-06 1978-11-30 Licentia Gmbh Communications system with synchronised scrambler - determines whether start code for received identifying character has been stored
EP0032107A1 (en) * 1979-12-20 1981-07-15 GRETAG Aktiengesellschaft Enciphering and deciphering system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2722700A1 (en) * 1973-07-06 1978-11-30 Licentia Gmbh Communications system with synchronised scrambler - determines whether start code for received identifying character has been stored
DE2659622B1 (en) * 1976-12-30 1978-05-11 Siemens Ag Radiotelephony system
EP0032107A1 (en) * 1979-12-20 1981-07-15 GRETAG Aktiengesellschaft Enciphering and deciphering system

Also Published As

Publication number Publication date
EP0136681B1 (en) 1988-07-13
ATE35754T1 (en) 1988-07-15
EP0136681A2 (en) 1985-04-10
DE3335672A1 (en) 1985-04-04
DE3472742D1 (en) 1988-08-18

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