JPH0442862B2 - - Google Patents

Info

Publication number
JPH0442862B2
JPH0442862B2 JP57169552A JP16955282A JPH0442862B2 JP H0442862 B2 JPH0442862 B2 JP H0442862B2 JP 57169552 A JP57169552 A JP 57169552A JP 16955282 A JP16955282 A JP 16955282A JP H0442862 B2 JPH0442862 B2 JP H0442862B2
Authority
JP
Japan
Prior art keywords
analog
line
secret
button
subscriber
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.)
Expired - Lifetime
Application number
JP57169552A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5961242A (ja
Inventor
Hiroshi Ebihara
Shinjiro Suzuki
Shigeki Tanaka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16955282A priority Critical patent/JPS5961242A/ja
Publication of JPS5961242A publication Critical patent/JPS5961242A/ja
Publication of JPH0442862B2 publication Critical patent/JPH0442862B2/ja
Granted 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)
JP16955282A 1982-09-30 1982-09-30 秘匿通信システム Granted JPS5961242A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16955282A JPS5961242A (ja) 1982-09-30 1982-09-30 秘匿通信システム

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16955282A JPS5961242A (ja) 1982-09-30 1982-09-30 秘匿通信システム

Publications (2)

Publication Number Publication Date
JPS5961242A JPS5961242A (ja) 1984-04-07
JPH0442862B2 true JPH0442862B2 (enrdf_load_html_response) 1992-07-14

Family

ID=15888581

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16955282A Granted JPS5961242A (ja) 1982-09-30 1982-09-30 秘匿通信システム

Country Status (1)

Country Link
JP (1) JPS5961242A (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003204323A (ja) 2000-12-21 2003-07-18 Yasumasa Uyama 秘密通信方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1399365A (en) * 1971-09-07 1975-07-02 Boeing Co Apparatus for coding audio signals
US4167700A (en) * 1977-05-02 1979-09-11 Motorola, Inc. Digital voice protection system and method
EP0028688A1 (de) * 1979-11-07 1981-05-20 Crypto Aktiengesellschaft Anlage für die Übertragung von Steuersignalen über einen Sprachkanal

Also Published As

Publication number Publication date
JPS5961242A (ja) 1984-04-07

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