JPS5534519A - Encrypt data communication system - Google Patents

Encrypt data communication system

Info

Publication number
JPS5534519A
JPS5534519A JP10648878A JP10648878A JPS5534519A JP S5534519 A JPS5534519 A JP S5534519A JP 10648878 A JP10648878 A JP 10648878A JP 10648878 A JP10648878 A JP 10648878A JP S5534519 A JPS5534519 A JP S5534519A
Authority
JP
Japan
Prior art keywords
data
insignificant
converted
pseudo signal
significant
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
JP10648878A
Other languages
Japanese (ja)
Inventor
Yukio Izeki
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 JP10648878A priority Critical patent/JPS5534519A/en
Publication of JPS5534519A publication Critical patent/JPS5534519A/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)

Abstract

PURPOSE:To prevent the leakage of the encrypt key by coding both the significant data and the insignificant data under discontinuation of transmission together and furthermore giving the pseudo signal to the insignificant data before coding. CONSTITUTION:The starting (terminating) code is detected through detection circuit 12 for the contents set to buffer 8. The insignificant data is converted into the pseudo signal through pseudo signal generation part 13 with elimination of the starting/terminating codes and then applied to output selection gate 9 to be gated as if it were combined with the significant dand then transmission. At the reception side, the code is decoded with the given key and then set to buffer 17, and the significant data is separated from the insignificant data through message detection circuit 20. The insignificant are all 1, which is unnatural and thus can be looked throug. In this connection, the insifnificant data are converted under the fixed rule and then transmitted. These converted signals are converted into all one pattern via circuit 21.
JP10648878A 1978-08-31 1978-08-31 Encrypt data communication system Pending JPS5534519A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10648878A JPS5534519A (en) 1978-08-31 1978-08-31 Encrypt data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10648878A JPS5534519A (en) 1978-08-31 1978-08-31 Encrypt data communication system

Publications (1)

Publication Number Publication Date
JPS5534519A true JPS5534519A (en) 1980-03-11

Family

ID=14434840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10648878A Pending JPS5534519A (en) 1978-08-31 1978-08-31 Encrypt data communication system

Country Status (1)

Country Link
JP (1) JPS5534519A (en)

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