JPS56143744A - Data interchanging system - Google Patents

Data interchanging system

Info

Publication number
JPS56143744A
JPS56143744A JP4665680A JP4665680A JPS56143744A JP S56143744 A JPS56143744 A JP S56143744A JP 4665680 A JP4665680 A JP 4665680A JP 4665680 A JP4665680 A JP 4665680A JP S56143744 A JPS56143744 A JP S56143744A
Authority
JP
Japan
Prior art keywords
data
coded
telegram
coding
switchboard
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
JP4665680A
Other languages
Japanese (ja)
Inventor
Akira Mabukuro
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4665680A priority Critical patent/JPS56143744A/en
Publication of JPS56143744A publication Critical patent/JPS56143744A/en
Pending legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To enable secret communication which maintains secrecy via a switchboard, by performing different coding to a keyword, etc., for telegram decoding without coding a header part where information required for the storage and exchange of a coded telegram is added. CONSTITUTION:Coding device 102 which codes data 101 from data transmitter- receiver 100, frame headers F, A and C, which are required for storage and exchange, in the frame format of the data are not coded and data indicating a keyward required for the decoding, the contents of rules, and the starting position are coded in a different way from that of a telegram and inserted into the header part to obtain signal 302, which is transmitted to data switchboard 300. At a reception side, the data are decoded and received by transmitter-receiver 100.
JP4665680A 1980-04-09 1980-04-09 Data interchanging system Pending JPS56143744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4665680A JPS56143744A (en) 1980-04-09 1980-04-09 Data interchanging system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4665680A JPS56143744A (en) 1980-04-09 1980-04-09 Data interchanging system

Publications (1)

Publication Number Publication Date
JPS56143744A true JPS56143744A (en) 1981-11-09

Family

ID=12753361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4665680A Pending JPS56143744A (en) 1980-04-09 1980-04-09 Data interchanging system

Country Status (1)

Country Link
JP (1) JPS56143744A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107658A (en) * 1982-12-10 1984-06-21 Nec Corp Method and apparatus of private talk
JPH0338131A (en) * 1989-06-28 1991-02-19 Digital Equip Corp <Dec> Method of using the key, whichis coded in computer network, as the key identifier in data packet
JPH0470029A (en) * 1990-07-09 1992-03-05 Hajime Kitagawa Ciphering adaptor
JPH04189045A (en) * 1990-11-22 1992-07-07 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set
JPH0756507A (en) * 1993-08-12 1995-03-03 Nec Corp Ciphering and deciphering device for data security protection device
JPH11112491A (en) * 1997-10-06 1999-04-23 Toshiba Corp Call originating information monitoring method and terminal device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59107658A (en) * 1982-12-10 1984-06-21 Nec Corp Method and apparatus of private talk
JPH0527291B2 (en) * 1982-12-10 1993-04-20 Nippon Electric Co
JPH0338131A (en) * 1989-06-28 1991-02-19 Digital Equip Corp <Dec> Method of using the key, whichis coded in computer network, as the key identifier in data packet
JPH0470029A (en) * 1990-07-09 1992-03-05 Hajime Kitagawa Ciphering adaptor
JPH04189045A (en) * 1990-11-22 1992-07-07 Nippon Telegr & Teleph Corp <Ntt> Privacy call telephone set
JPH0756507A (en) * 1993-08-12 1995-03-03 Nec Corp Ciphering and deciphering device for data security protection device
JPH11112491A (en) * 1997-10-06 1999-04-23 Toshiba Corp Call originating information monitoring method and terminal device

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