JPS5555641A - Cryptogram delivery system - Google Patents

Cryptogram delivery system

Info

Publication number
JPS5555641A
JPS5555641A JP12828278A JP12828278A JPS5555641A JP S5555641 A JPS5555641 A JP S5555641A JP 12828278 A JP12828278 A JP 12828278A JP 12828278 A JP12828278 A JP 12828278A JP S5555641 A JPS5555641 A JP S5555641A
Authority
JP
Japan
Prior art keywords
flag
data
pattern
cryptogram
succession
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
JP12828278A
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 JP12828278A priority Critical patent/JPS5555641A/en
Publication of JPS5555641A publication Critical patent/JPS5555641A/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

Abstract

PURPOSE:To perform high speed detection for the start point of cryptogram and/or decoding process, by adding the message data start bit pattern in succession with the pattern data before the significant message in cryptogram. CONSTITUTION:The data added with flag at the head is fed to the register 7 to monitor 11 the flag of data set to the buffer 6. The content of the register 7 is fed to the control section 9 after cryptogram 8 directly. The message data start bit pattern ''1'' is added immediately after the flag, the communication end pattern ''0'' is added in succession with the end flag, and ''1'' shows idle state in succession. This output is set to the buffer 14 at reception side and it is fed to the flag monitor and output control section 16 with demodulation 16 directly. The control section 16 detects the message data start bit pattern in succession with the head flag to receive the demodulated data. The start bit pattern is thrown away, decoding data is given to flag, output is made to the terminal unit, and idle pattern ''1'' is fed after the detection of communication end pattern.
JP12828278A 1978-10-18 1978-10-18 Cryptogram delivery system Pending JPS5555641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12828278A JPS5555641A (en) 1978-10-18 1978-10-18 Cryptogram delivery system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12828278A JPS5555641A (en) 1978-10-18 1978-10-18 Cryptogram delivery system

Publications (1)

Publication Number Publication Date
JPS5555641A true JPS5555641A (en) 1980-04-23

Family

ID=14980961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12828278A Pending JPS5555641A (en) 1978-10-18 1978-10-18 Cryptogram delivery system

Country Status (1)

Country Link
JP (1) JPS5555641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62120746A (en) * 1985-11-20 1987-06-02 Sanyo Electric Co Ltd Privacy communication equipment
JPH02148085A (en) * 1988-11-30 1990-06-06 Toshiba Corp Recorder for portable medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62120746A (en) * 1985-11-20 1987-06-02 Sanyo Electric Co Ltd Privacy communication equipment
JPH02148085A (en) * 1988-11-30 1990-06-06 Toshiba Corp Recorder for portable medium

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