JPS543402A - Privacy communication system - Google Patents

Privacy communication system

Info

Publication number
JPS543402A
JPS543402A JP6854077A JP6854077A JPS543402A JP S543402 A JPS543402 A JP S543402A JP 6854077 A JP6854077 A JP 6854077A JP 6854077 A JP6854077 A JP 6854077A JP S543402 A JPS543402 A JP S543402A
Authority
JP
Japan
Prior art keywords
privacy
communication system
privacy communication
communication
rescue
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.)
Pending
Application number
JP6854077A
Other languages
Japanese (ja)
Inventor
Shinsuke Ishikawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP6854077A priority Critical patent/JPS543402A/en
Publication of JPS543402A publication Critical patent/JPS543402A/en
Pending 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)

Abstract

PURPOSE:To ensure an easy rescue communication for occurrence of a rescue accident, by adding the discrimination signal of the privacy communication, decoding the privacy when the discrimination signal is received, and then receiving the privacy only at the privacy communication time and securing a receivable state for the live signal at all times.
JP6854077A 1977-06-09 1977-06-09 Privacy communication system Pending JPS543402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6854077A JPS543402A (en) 1977-06-09 1977-06-09 Privacy communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6854077A JPS543402A (en) 1977-06-09 1977-06-09 Privacy communication system

Publications (1)

Publication Number Publication Date
JPS543402A true JPS543402A (en) 1979-01-11

Family

ID=13376669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6854077A Pending JPS543402A (en) 1977-06-09 1977-06-09 Privacy communication system

Country Status (1)

Country Link
JP (1) JPS543402A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5799043A (en) * 1980-12-11 1982-06-19 Matsushita Electric Ind Co Ltd Mobile radio communication system
JPH0481039A (en) * 1990-07-20 1992-03-13 Nippon Telegr & Teleph Corp <Ntt> Voice ciphering device
JPH04150339A (en) * 1990-10-11 1992-05-22 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set
JPH04189045A (en) * 1990-11-22 1992-07-07 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5799043A (en) * 1980-12-11 1982-06-19 Matsushita Electric Ind Co Ltd Mobile radio communication system
JPH0481039A (en) * 1990-07-20 1992-03-13 Nippon Telegr & Teleph Corp <Ntt> Voice ciphering device
JPH04150339A (en) * 1990-10-11 1992-05-22 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set
JPH04189045A (en) * 1990-11-22 1992-07-07 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set

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