JPS5528620A - Synchronizing system of communication line - Google Patents

Synchronizing system of communication line

Info

Publication number
JPS5528620A
JPS5528620A JP10173178A JP10173178A JPS5528620A JP S5528620 A JPS5528620 A JP S5528620A JP 10173178 A JP10173178 A JP 10173178A JP 10173178 A JP10173178 A JP 10173178A JP S5528620 A JPS5528620 A JP S5528620A
Authority
JP
Japan
Prior art keywords
random number
code
synchronizing
given
frame
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
JP10173178A
Other languages
Japanese (ja)
Other versions
JPS593911B2 (en
Inventor
Kazu Moriyama
Takao Kiogawa
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.)
Kokusai Electric Corp
Original Assignee
Kokusai 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 Kokusai Electric Corp filed Critical Kokusai Electric Corp
Priority to JP53101731A priority Critical patent/JPS593911B2/en
Publication of JPS5528620A publication Critical patent/JPS5528620A/en
Publication of JPS593911B2 publication Critical patent/JPS593911B2/en
Expired 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
    • H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

PURPOSE:To perform the synchronism of transmission and reception effectively, by adding parity to the random number synchronizing signal giving random number to the frame synchronizing signal, in the system in which transmission is made by giving random number for confidentiality to the digital code of original information. CONSTITUTION:The input code (1-T) having frame constitution is once stored in the memory 1, this is read out while adding the synchronizing code every given frame at the synchronizing code addition circuit 2, and random number is given at the random number circuit 3, and after adding the parity code at the parity code addition circuit 4, transmission is made from the transmitter 5. The random number synchronizing code inserted at the head every given frame is circulatingly changed and in a given frame, the random number determined with the random number synchronizing code is given to the original information code.
JP53101731A 1978-08-23 1978-08-23 Communication line synchronization method Expired JPS593911B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53101731A JPS593911B2 (en) 1978-08-23 1978-08-23 Communication line synchronization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53101731A JPS593911B2 (en) 1978-08-23 1978-08-23 Communication line synchronization method

Publications (2)

Publication Number Publication Date
JPS5528620A true JPS5528620A (en) 1980-02-29
JPS593911B2 JPS593911B2 (en) 1984-01-26

Family

ID=14308407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53101731A Expired JPS593911B2 (en) 1978-08-23 1978-08-23 Communication line synchronization method

Country Status (1)

Country Link
JP (1) JPS593911B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6398236A (en) * 1986-10-15 1988-04-28 Nec Corp Digital information transmission system
JPH04501528A (en) * 1988-10-27 1992-03-19 トリトン・エンジニアリング・サービシーズ・カンパニー Drilling mud separation device
WO2002084936A1 (en) * 2001-04-13 2002-10-24 Fujitsu Limited Transmitting apparatus and receiving apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6398236A (en) * 1986-10-15 1988-04-28 Nec Corp Digital information transmission system
JPH04501528A (en) * 1988-10-27 1992-03-19 トリトン・エンジニアリング・サービシーズ・カンパニー Drilling mud separation device
WO2002084936A1 (en) * 2001-04-13 2002-10-24 Fujitsu Limited Transmitting apparatus and receiving apparatus

Also Published As

Publication number Publication date
JPS593911B2 (en) 1984-01-26

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