CA2337306A1 - Method and apparatus for symmetric-key encryption - Google Patents

Method and apparatus for symmetric-key encryption Download PDF

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Publication number
CA2337306A1
CA2337306A1 CA002337306A CA2337306A CA2337306A1 CA 2337306 A1 CA2337306 A1 CA 2337306A1 CA 002337306 A CA002337306 A CA 002337306A CA 2337306 A CA2337306 A CA 2337306A CA 2337306 A1 CA2337306 A1 CA 2337306A1
Authority
CA
Canada
Prior art keywords
plain text
random number
text blocks
feedback value
symmetric
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
CA002337306A
Other languages
French (fr)
Other versions
CA2337306C (en
Inventor
Masashi Takahashi
Hiroyuki Kurumatani
Kunihiko Miyazaki
Dai Watanabe
Soichi Furuya
Kazuo Takaragi
Hisayoshi Sato
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of CA2337306A1 publication Critical patent/CA2337306A1/en
Application granted granted Critical
Publication of CA2337306C publication Critical patent/CA2337306C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0822—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using key encryption key
    • 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
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H04L9/0625—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation with splitting of the data block into left and right halves, e.g. Feistel based algorithms, DES, FEAL, IDEA or KASUMI
    • 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
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H04L9/0637—Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
    • 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
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
    • 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
    • H04L2209/125—Parallelization or pipelining, e.g. for accelerating processing of cryptographic operations
    • 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
    • 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
    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

Abstract

The present invention provides a symmetric-key cryptographic technique capable of realizing both high-speed cryptographic processing having a high degree of parallelism and alteration detection. The present invention performs the steps of: dividing plain text composed of redundancy data and a message to generate a plurality of plain text blocks each having a predetermined length; generating a random number sequence based on a secret key; generating a random number block corresponding to one of the plurality of plain text blocks from the random number sequence;
outputting a feedback value obtained as a result of operation on the one of the plurality of plain text blocks and the random number block, the feedback value being fed back to another one of the plurality of plain text blocks;
and performing an encryption operation using the one of the plurality of plain text blocks, the random number block, and a feedback value obtained as a result of operation on still another one of the plurality of plain text blocks to produce a ciphertext block.
CA002337306A 2000-03-09 2001-02-15 Method and apparatus for symmetric-key encryption Expired - Fee Related CA2337306C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000-070994 2000-03-09
JP2000070994 2000-03-09
JP2000-210690 2000-07-06
JP2000210690A JP3864675B2 (en) 2000-03-09 2000-07-06 Common key encryption device

Publications (2)

Publication Number Publication Date
CA2337306A1 true CA2337306A1 (en) 2001-09-09
CA2337306C CA2337306C (en) 2004-05-25

Family

ID=26587471

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002337306A Expired - Fee Related CA2337306C (en) 2000-03-09 2001-02-15 Method and apparatus for symmetric-key encryption

Country Status (4)

Country Link
US (3) US7110545B2 (en)
EP (1) EP1133099A3 (en)
JP (1) JP3864675B2 (en)
CA (1) CA2337306C (en)

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CN113630386A (en) * 2021-07-15 2021-11-09 金杉 Encryption and decryption method, device and communication system thereof
US11601260B1 (en) 2021-10-29 2023-03-07 Uti Limited Partnership Encryption/decryption using key encapsulation/decapsulation

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US11601260B1 (en) 2021-10-29 2023-03-07 Uti Limited Partnership Encryption/decryption using key encapsulation/decapsulation
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Also Published As

Publication number Publication date
US20010021254A1 (en) 2001-09-13
CA2337306C (en) 2004-05-25
US20070064944A1 (en) 2007-03-22
US7200232B2 (en) 2007-04-03
US20010021253A1 (en) 2001-09-13
EP1133099A2 (en) 2001-09-12
US7359515B2 (en) 2008-04-15
EP1133099A3 (en) 2004-02-11
US7110545B2 (en) 2006-09-19
JP2001324925A (en) 2001-11-22
JP3864675B2 (en) 2007-01-10

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