WO2009034929A1 - Ciphering method, ciphering device, and cipher processing program - Google Patents

Ciphering method, ciphering device, and cipher processing program Download PDF

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Publication number
WO2009034929A1
WO2009034929A1 PCT/JP2008/066097 JP2008066097W WO2009034929A1 WO 2009034929 A1 WO2009034929 A1 WO 2009034929A1 JP 2008066097 W JP2008066097 W JP 2008066097W WO 2009034929 A1 WO2009034929 A1 WO 2009034929A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
pieces
ciphering
processings
exclusive
Prior art date
Application number
PCT/JP2008/066097
Other languages
French (fr)
Japanese (ja)
Inventor
Tomoyasu Suzaki
Yukiyasu Tsunoo
Hiroyasu Kubo
Teruo Saito
Takeshi Kawabata
Hiroki Nakashima
Maki Shigeri
Original Assignee
Nec Corporation
Nec Software Hokuriku, 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 Corporation, Nec Software Hokuriku, Ltd. filed Critical Nec Corporation
Priority to JP2009532167A priority Critical patent/JPWO2009034929A1/en
Publication of WO2009034929A1 publication Critical patent/WO2009034929A1/en

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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
    • H04L9/06—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

Abstract

A ciphering method and device, and a cipher processing program capable of realizing resistance against a deciphering method of differential/linear deciphering and the speedup of the processing time are provided. The ciphering method includes (A) nonlinear transform processings for dividing input data into at least four or more of 2m pieces of data and mixing m pieces of data out of the 2m pieces of data with key data in the Feistel structure of three rounds, (B) an exclusive OR calculation processing for calculating m pieces of the exclusive OR of each of the results of the nonlinear transform processings and data which has not been subjectto the nonlinear transform processings, and (C) an interchange processing for interchanging 2m pieces of data of the m pieces of data which has been subject to the exclusive OR calculation and the m pieces of data which has been subject to the input of the nonlinear transform processings to send them to the next stage. The processings from the (A) to (C) are repeated n times and 2m pieces of data obtained after the nth interchange are combined to generate output data.
PCT/JP2008/066097 2007-09-12 2008-09-05 Ciphering method, ciphering device, and cipher processing program WO2009034929A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009532167A JPWO2009034929A1 (en) 2007-09-12 2008-09-05 Encryption method, encryption device, and encryption processing program

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-236953 2007-09-12
JP2007236953 2007-09-12

Publications (1)

Publication Number Publication Date
WO2009034929A1 true WO2009034929A1 (en) 2009-03-19

Family

ID=40451937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066097 WO2009034929A1 (en) 2007-09-12 2008-09-05 Ciphering method, ciphering device, and cipher processing program

Country Status (2)

Country Link
JP (1) JPWO2009034929A1 (en)
WO (1) WO2009034929A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011052587A1 (en) * 2009-10-27 2011-05-05 日本電気株式会社 Block encryption apparatus, block encryption method and program

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09269727A (en) * 1996-03-29 1997-10-14 Toshiba Corp Ciphering method and ciphering device
JPH1152849A (en) * 1997-08-07 1999-02-26 Nec Corp Ciphering device and recording medium on which program is recorded to realize device readable with computer
JP2002149058A (en) * 1995-09-05 2002-05-22 Mitsubishi Electric Corp Data transform device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002149058A (en) * 1995-09-05 2002-05-22 Mitsubishi Electric Corp Data transform device
JPH09269727A (en) * 1996-03-29 1997-10-14 Toshiba Corp Ciphering method and ciphering device
JPH1152849A (en) * 1997-08-07 1999-02-26 Nec Corp Ciphering device and recording medium on which program is recorded to realize device readable with computer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YULIANG ZHENG: "On the construction of block ciphers provably secure and not relying on any unproved hypotheses", PROCEEDINGS OF CRYPTO `89 LECTURE NOTES IN COMPUTER SCIENCE, vol. 435, 1989, SPRINGER-VERLAG, pages 461 - 480 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011052587A1 (en) * 2009-10-27 2011-05-05 日本電気株式会社 Block encryption apparatus, block encryption method and program
CN102598574A (en) * 2009-10-27 2012-07-18 日本电气株式会社 Block encryption apparatus, block encryption method and program
JP5488608B2 (en) * 2009-10-27 2014-05-14 日本電気株式会社 Block encryption apparatus, block encryption method and program
US8891758B2 (en) 2009-10-27 2014-11-18 Nec Corporation Block encryption device and method and computer program

Also Published As

Publication number Publication date
JPWO2009034929A1 (en) 2010-12-24

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