FR2376574B1 - - Google Patents

Info

Publication number
FR2376574B1
FR2376574B1 FR7738247A FR7738247A FR2376574B1 FR 2376574 B1 FR2376574 B1 FR 2376574B1 FR 7738247 A FR7738247 A FR 7738247A FR 7738247 A FR7738247 A FR 7738247A FR 2376574 B1 FR2376574 B1 FR 2376574B1
Authority
FR
France
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.)
Expired
Application number
FR7738247A
Other languages
French (fr)
Other versions
FR2376574A1 (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.)
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
Publication of FR2376574A1 publication Critical patent/FR2376574A1/en
Application granted granted Critical
Publication of FR2376574B1 publication Critical patent/FR2376574B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
FR7738247A 1976-12-30 1977-12-19 RADIOTELEPHONY SYSTEM Granted FR2376574A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2659622A DE2659622C2 (en) 1976-12-30 1976-12-30 Radiotelephony system

Publications (2)

Publication Number Publication Date
FR2376574A1 FR2376574A1 (en) 1978-07-28
FR2376574B1 true FR2376574B1 (en) 1980-08-22

Family

ID=5997076

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7738247A Granted FR2376574A1 (en) 1976-12-30 1977-12-19 RADIOTELEPHONY SYSTEM

Country Status (10)

Country Link
JP (1) JPS5826864B2 (en)
AT (1) AT360593B (en)
BE (1) BE862540A (en)
CH (1) CH625650A5 (en)
DE (1) DE2659622C2 (en)
DK (1) DK148049B (en)
FR (1) FR2376574A1 (en)
GB (1) GB1584579A (en)
IT (1) IT1089194B (en)
NL (1) NL176823C (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2927885A1 (en) * 1979-07-11 1981-01-29 Bosch Gmbh Robert Radio communication security system - has mobile transceivers, each using dedicated code which is decoded at main station from call number
DE3150254A1 (en) * 1981-04-13 1983-07-14 Siemens AG, 1000 Berlin und 8000 München DEVICE FOR ENCRYPTED DIGITAL INFORMATION TRANSFER
US4549308A (en) * 1982-07-12 1985-10-22 At&T Bell Laboratories Secure mobile radio telephony
DE3335672A1 (en) * 1983-09-30 1985-04-04 Siemens AG, 1000 Berlin und 8000 München ENCRYPTED MESSAGE TRANSMISSION METHOD
DE3439159A1 (en) * 1984-01-25 1986-04-30 Philips Kommunikations Industrie AG, 8500 Nürnberg Dialling method secured against fraudulent use
DE3402467A1 (en) * 1984-01-25 1985-08-01 Philips Kommunikations Industrie AG, 8500 Nürnberg Dialling method protected against fraudulent use, for the subscribers of a radio network, in particular a mobile radio network
DE3410936C2 (en) * 1984-03-24 1997-09-18 Philips Patentverwaltung Method for recognizing the unauthorized use of an identification assigned to a mobile radio station in a radio transmission system
DE3420874A1 (en) * 1984-06-05 1985-12-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Method and arrangement for monitoring network access in telecommunications networks
DE3439120A1 (en) * 1984-10-25 1986-05-07 Philips Kommunikations Industrie AG, 8500 Nürnberg Method for identifying a subscriber station of a telecommunications network
JPS61199342A (en) * 1985-02-28 1986-09-03 Tamura Electric Works Ltd Cordless telephone set
DE4242151C1 (en) * 1992-12-14 1994-03-24 Detecon Gmbh Protecting mobile radio, e.g. telephone, against unauthorised use - comparing authentication parameter from input code to stored parameter, only allowing use if they match.
DE4336995A1 (en) * 1993-10-29 1995-05-04 Sel Alcatel Ag Method and device for determining the assignment of a mobile radio device to device lists

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE371064B (en) * 1973-03-09 1974-11-04 Philips Svenska Ab

Also Published As

Publication number Publication date
DE2659622C2 (en) 1979-01-04
CH625650A5 (en) 1981-09-30
DE2659622B1 (en) 1978-05-11
IT1089194B (en) 1985-06-18
AT360593B (en) 1981-01-26
ATA938977A (en) 1980-06-15
NL176823B (en) 1985-01-02
NL176823C (en) 1985-06-03
NL7714545A (en) 1978-07-04
GB1584579A (en) 1981-02-11
DK585277A (en) 1978-07-01
DK148049B (en) 1985-02-11
BE862540A (en) 1978-04-14
JPS5384602A (en) 1978-07-26
JPS5826864B2 (en) 1983-06-06
FR2376574A1 (en) 1978-07-28

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Legal Events

Date Code Title Description
ST Notification of lapse