Shingo YANAGIHARA


Type 1.x Generalized Feistel Structures
Shingo YANAGIHARA Tetsu IWATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/04/01
Vol. E97-A  No. 4  pp. 952-963
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
blockcipherGeneralized Feistel Structure (GFS)Type 1.x GFSpermutation layer
 Summary | Full Text:PDF

Cryptanalysis of 249-, 250-, ..., 256-Bit Key HyRAL via Equivalent Keys
Yuki ASANO Shingo YANAGIHARA Tetsu IWATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 371-383
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
cryptanalysisblockcipherHyRALequivalent key
 Summary | Full Text:PDF

Improving the Permutation Layer of Type 1, Type 3, Source-Heavy, and Target-Heavy Generalized Feistel Structures
Shingo YANAGIHARA Tetsu IWATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 2-14
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Key Cryptography
Keyword: 
blockciphergeneralized Feistel structure (GFS)permutation layercomputer experiment.
 Summary | Full Text:PDF