岡山大学環境理工学部研究報告 ISSN 2187-6940
Published by Faculty of Environmental Science and Technology, Okayama University

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Linear and Differential Cryptanalysis of SHA-256

Wang Xiao Dong
Abstract
The one-way hash function plays an important role in digital signatures and message authentication from the viewpoint of security. No effective attacking method has been discovered to the algorithm of hash function standard. In this study, we tried to attack SHA-256 in encryption mode using linear and differential cryptanalysis to solve a private key. We deduced that an estimate of the private key would require huge known and chosen plaintexts in both linear and differential cryptanalysis, and that it would be difficult to decipher SHA-256 in view of the required computation.
Keywords
differential cryptanalysis
encryption mode
hash function
linear cryptanalysis
SHA-256
ISSN
1341-9099
NCID
AN10529213