JPS5318304A - Privacy communication unit - Google Patents

Privacy communication unit

Info

Publication number
JPS5318304A
JPS5318304A JP9304876A JP9304876A JPS5318304A JP S5318304 A JPS5318304 A JP S5318304A JP 9304876 A JP9304876 A JP 9304876A JP 9304876 A JP9304876 A JP 9304876A JP S5318304 A JPS5318304 A JP S5318304A
Authority
JP
Japan
Prior art keywords
communication unit
privacy communication
privacy
secure
signal
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
JP9304876A
Other languages
Japanese (ja)
Inventor
Shigeru Asakawa
Fumio Sugiyama
Makoto Nakamura
Tsukasa Okai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9304876A priority Critical patent/JPS5318304A/en
Publication of JPS5318304A publication Critical patent/JPS5318304A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To secure a privacy of the communication contents satisfactorily by having an alternate transmission of the original signal and its inversion signal.
JP9304876A 1976-08-04 1976-08-04 Privacy communication unit Pending JPS5318304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9304876A JPS5318304A (en) 1976-08-04 1976-08-04 Privacy communication unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9304876A JPS5318304A (en) 1976-08-04 1976-08-04 Privacy communication unit

Publications (1)

Publication Number Publication Date
JPS5318304A true JPS5318304A (en) 1978-02-20

Family

ID=14071613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9304876A Pending JPS5318304A (en) 1976-08-04 1976-08-04 Privacy communication unit

Country Status (1)

Country Link
JP (1) JPS5318304A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196636A (en) * 1981-05-28 1982-12-02 Fujitsu Ten Ltd Wire telephone transmitter
JPS62290223A (en) * 1986-06-10 1987-12-17 Pioneer Answerphone Mfg Corp Scramble/descramble system for narrow band transmission system
JPH02162932A (en) * 1988-12-16 1990-06-22 Sony Corp Transmitter-receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57196636A (en) * 1981-05-28 1982-12-02 Fujitsu Ten Ltd Wire telephone transmitter
JPS62290223A (en) * 1986-06-10 1987-12-17 Pioneer Answerphone Mfg Corp Scramble/descramble system for narrow band transmission system
JPH02162932A (en) * 1988-12-16 1990-06-22 Sony Corp Transmitter-receiver

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