JPS5652948A - Random number switching system of privacy data communication system - Google Patents

Random number switching system of privacy data communication system

Info

Publication number
JPS5652948A
JPS5652948A JP12860079A JP12860079A JPS5652948A JP S5652948 A JPS5652948 A JP S5652948A JP 12860079 A JP12860079 A JP 12860079A JP 12860079 A JP12860079 A JP 12860079A JP S5652948 A JPS5652948 A JP S5652948A
Authority
JP
Japan
Prior art keywords
circuit
key
output
random number
key data
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
JP12860079A
Other languages
Japanese (ja)
Inventor
Shingo Ono
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP12860079A priority Critical patent/JPS5652948A/en
Publication of JPS5652948A publication Critical patent/JPS5652948A/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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/08—Randomization, e.g. dummy operations or using noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/12—Details relating to cryptographic hardware or logic circuitry

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To change a key automatically, by sending out a synchronous pattern including the change command information of a key data file consisting of random numbers, using a new key data file after sending out the said pattern, and also using a new key data file in the receiving side after receiving the said synchronous pattern. CONSTITUTION:In case a key is changed, a key change time signal is sent out to the timing circuit 2 and the key No. store circuit 3 from the time designating circuit 1. An output from the key change command pattern generating circuit 10 is provided to the output circuit 8 by an output of the circuit 2, also an output of the key data circuit 5 is changed to a random number 6 by an output from the circuit 3, is provided to the circuit 8, and these outputs are sent out to the receiving side by the circuit 8. On the other hand, in the receiving side, a key change time signal is provided to the timing circuit 2' and the circuit 3 from the circuit 1, the circuit 2' provided a receiving key load trigger to the circuit 5, and the circuit 3 provides a key No. corresponding to a time to the circuit 5. The circuit 6 supplies the key data signal to the random number generating circuit 6.
JP12860079A 1979-10-05 1979-10-05 Random number switching system of privacy data communication system Pending JPS5652948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12860079A JPS5652948A (en) 1979-10-05 1979-10-05 Random number switching system of privacy data communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12860079A JPS5652948A (en) 1979-10-05 1979-10-05 Random number switching system of privacy data communication system

Publications (1)

Publication Number Publication Date
JPS5652948A true JPS5652948A (en) 1981-05-12

Family

ID=14988773

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12860079A Pending JPS5652948A (en) 1979-10-05 1979-10-05 Random number switching system of privacy data communication system

Country Status (1)

Country Link
JP (1) JPS5652948A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178040A (en) * 1983-03-29 1984-10-09 Fujitsu Ltd System for distributing and processing key information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59178040A (en) * 1983-03-29 1984-10-09 Fujitsu Ltd System for distributing and processing key information

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