JPS56153862A - Privacy telephone system - Google Patents

Privacy telephone system

Info

Publication number
JPS56153862A
JPS56153862A JP5550980A JP5550980A JPS56153862A JP S56153862 A JPS56153862 A JP S56153862A JP 5550980 A JP5550980 A JP 5550980A JP 5550980 A JP5550980 A JP 5550980A JP S56153862 A JPS56153862 A JP S56153862A
Authority
JP
Japan
Prior art keywords
counter
exchange
key
bits
reset
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.)
Granted
Application number
JP5550980A
Other languages
English (en)
Japanese (ja)
Other versions
JPS624021B2 (enrdf_load_stackoverflow
Inventor
Keiichi Sakurai
Keiichiro Koga
Takuo Muratani
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.)
KDDI Corp
Original Assignee
Kokusai Denshin Denwa KK
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 Kokusai Denshin Denwa KK filed Critical Kokusai Denshin Denwa KK
Priority to JP5550980A priority Critical patent/JPS56153862A/ja
Publication of JPS56153862A publication Critical patent/JPS56153862A/ja
Publication of JPS624021B2 publication Critical patent/JPS624021B2/ja
Granted 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)
JP5550980A 1980-04-28 1980-04-28 Privacy telephone system Granted JPS56153862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5550980A JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5550980A JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Publications (2)

Publication Number Publication Date
JPS56153862A true JPS56153862A (en) 1981-11-28
JPS624021B2 JPS624021B2 (enrdf_load_stackoverflow) 1987-01-28

Family

ID=13000639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5550980A Granted JPS56153862A (en) 1980-04-28 1980-04-28 Privacy telephone system

Country Status (1)

Country Link
JP (1) JPS56153862A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140933A (ja) * 1983-12-27 1985-07-25 Sony Corp 帯域圧縮・伸長装置
JPS60140942A (ja) * 1983-12-27 1985-07-25 Sony Corp 信号伝送装置
JPS6216639A (ja) * 1985-07-16 1987-01-24 Kokusai Denshin Denwa Co Ltd <Kdd> 秘話音声信号送出装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE TRANSACTION ON ACOSTICS SPEECH AND SIGNAL PROCESSING=1979M4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60140933A (ja) * 1983-12-27 1985-07-25 Sony Corp 帯域圧縮・伸長装置
JPS60140942A (ja) * 1983-12-27 1985-07-25 Sony Corp 信号伝送装置
JPS6216639A (ja) * 1985-07-16 1987-01-24 Kokusai Denshin Denwa Co Ltd <Kdd> 秘話音声信号送出装置

Also Published As

Publication number Publication date
JPS624021B2 (enrdf_load_stackoverflow) 1987-01-28

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