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JPS5640343A - Data converting method - Google Patents

Data converting method

Info

Publication number
JPS5640343A
JPS5640343A JP11620279A JP11620279A JPS5640343A JP S5640343 A JPS5640343 A JP S5640343A JP 11620279 A JP11620279 A JP 11620279A JP 11620279 A JP11620279 A JP 11620279A JP S5640343 A JPS5640343 A JP S5640343A
Authority
JP
Japan
Prior art keywords
bytes
divided
byte
processing
transfer processing
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
JP11620279A
Other languages
Japanese (ja)
Other versions
JPS593912B2 (en
Inventor
Kunio Furuya
Shoji Miyaguchi
Masanori Mizuta
Taiho Higuchi
Yasusuke Kawamura
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP54116202A priority Critical patent/JPS593912B2/en
Publication of JPS5640343A publication Critical patent/JPS5640343A/en
Publication of JPS593912B2 publication Critical patent/JPS593912B2/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
    • H04L9/06—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
    • 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
    • H04L2209/30—Compression, e.g. Merkle-Damgard construction

Landscapes

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

Abstract

PURPOSE:To shorten the processing time, by dividing input data into every several bits and by arranging divided input data in arbitrary several bytes respectively and by performing the ciphering processing by the unit of one or more bytes, in data conversion for ciphering. CONSTITUTION:The ordinary writing of 8-byte codes is subjected to the character transfer processing first. Next, input data is divided by four bits successively, and divided four bits are stuffed to the right half of one byte of output data to expand the preceding 8-byte output to double 16 bytes. These 16 bytes are divided into right 8 bytes and left 8 bytes (r0 and l0), and r0 is subjected to the expansion character transfer processing. Meanwhile, 48-bit (6-byte) key is expanded to 8-bytes, and exclusive OR between this key and the output of the expansion transfer processing is operated for every bit. Next, the compressional character conversion processing and the character transfer processing are performed to operate exclusive OR between the key and l0 for every bit. By repeating these processings, the original code is converted to a new code.
JP54116202A 1979-09-12 1979-09-12 Data conversion method Expired JPS593912B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54116202A JPS593912B2 (en) 1979-09-12 1979-09-12 Data conversion method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54116202A JPS593912B2 (en) 1979-09-12 1979-09-12 Data conversion method

Publications (2)

Publication Number Publication Date
JPS5640343A true JPS5640343A (en) 1981-04-16
JPS593912B2 JPS593912B2 (en) 1984-01-26

Family

ID=14681357

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54116202A Expired JPS593912B2 (en) 1979-09-12 1979-09-12 Data conversion method

Country Status (1)

Country Link
JP (1) JPS593912B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6361280A (en) * 1986-09-02 1988-03-17 日本電気株式会社 Data converter
EP0278170A2 (en) * 1987-02-13 1988-08-17 Oki Electric Industry Company, Limited Cipher system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0424005Y2 (en) * 1986-10-11 1992-06-05

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6361280A (en) * 1986-09-02 1988-03-17 日本電気株式会社 Data converter
EP0278170A2 (en) * 1987-02-13 1988-08-17 Oki Electric Industry Company, Limited Cipher system

Also Published As

Publication number Publication date
JPS593912B2 (en) 1984-01-26

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