JPS5738042A - Data secrecy system - Google Patents

Data secrecy system

Info

Publication number
JPS5738042A
JPS5738042A JP11429980A JP11429980A JPS5738042A JP S5738042 A JPS5738042 A JP S5738042A JP 11429980 A JP11429980 A JP 11429980A JP 11429980 A JP11429980 A JP 11429980A JP S5738042 A JPS5738042 A JP S5738042A
Authority
JP
Japan
Prior art keywords
section
generation polynomial
random
logical equation
train
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
JP11429980A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ozeki
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP11429980A priority Critical patent/JPS5738042A/en
Publication of JPS5738042A publication Critical patent/JPS5738042A/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
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/065—Encryption by serially and continuously modifying data stream elements, e.g. stream cipher systems, RC4, SEAL or A5/3
    • H04L9/0656—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher
    • H04L9/0662—Pseudorandom key sequence combined element-for-element with data sequence, e.g. one-time-pad [OTP] or Vernam's cipher with particular pseudorandom sequence generator
    • 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
    • H04L2209/20—Manipulating the length of blocks of bits, e.g. padding or block truncation

Landscapes

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

Abstract

PURPOSE:To increase the ability of secrecy, by converting the original data every bit length at random. CONSTITUTION:An input data signal train A to be transmitted is transmitted to a reception section (not shown) as an output data via a generation polynomial operation section 6 divided with an indefinite logical equation. A clock signal inputted to the section 6 is counted at a clock counter 1 and it is compared with the number generated from a random number generator 3 at a comparator 2. When the both are in coincidence, the adderss value of an address counter 4 is increased by 1 to change the output of a generation polynomial random mode generating section 5 and the generation polynomial of the section 6. Thus, the data train A is changed with a logical equation making division every random number produced from the generator 3 and given to the reception side. The multiplication at the reception side with the same logical equation as that at the transmission side can reproduce the input data signal train A.
JP11429980A 1980-08-20 1980-08-20 Data secrecy system Pending JPS5738042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11429980A JPS5738042A (en) 1980-08-20 1980-08-20 Data secrecy system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11429980A JPS5738042A (en) 1980-08-20 1980-08-20 Data secrecy system

Publications (1)

Publication Number Publication Date
JPS5738042A true JPS5738042A (en) 1982-03-02

Family

ID=14634383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11429980A Pending JPS5738042A (en) 1980-08-20 1980-08-20 Data secrecy system

Country Status (1)

Country Link
JP (1) JPS5738042A (en)

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