Yasufumi HASHIMOTO


Key Recovery Attacks on Multivariate Public Key Cryptosystems Derived from Quadratic Forms over an Extension Field
Yasufumi HASHIMOTO 
Publication:   
Publication Date: 2017/01/01
Vol. E100-A  No. 1  pp. 18-25
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
multivariate public-key cryptosystems (MPKC)post-quantum cryptographyextension fieldquadratic forms
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Cryptanalysis of the Multivariate Signature Scheme Proposed in PQCrypto 2013
Yasufumi HASHIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/01/01
Vol. E99-A  No. 1  pp. 58-65
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
multivariate public key cryptosystemssignature schemequadratic formspost-quantum cryptography
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Cryptanalysis of the Quaternion Rainbow
Yasufumi HASHIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/01/01
Vol. E98-A  No. 1  pp. 144-152
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Public Key Based Cryptography
Keyword: 
post-quantum cryptographymultivariate public-key cryptosystemsRainbowquaternion ring
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Extended Algorithm for Solving Underdefined Multivariate Quadratic Equations
Hiroyuki MIURA Yasufumi HASHIMOTO Tsuyoshi TAKAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/06/01
Vol. E97-A  No. 6  pp. 1418-1425
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
multivariate public key cryptosystems (MPKCs)multivariate quadratic equationsMQ-problem
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General Fault Attacks on Multivariate Public Key Cryptosystems
Yasufumi HASHIMOTO Tsuyoshi TAKAGI Kouichi SAKURAI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/01/01
Vol. E96-A  No. 1  pp. 196-205
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Implementation
Keyword: 
post-quantum cryptographymultivariate public-key cryptosystemsfault attacks
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Algorithms to Solve Massively Under-Defined Systems of Multivariate Quadratic Equations
Yasufumi HASHIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/06/01
Vol. E94-A  No. 6  pp. 1257-1262
Type of Manuscript:  Special Section PAPER (Special Section on Discrete Mathematics and Its Applications)
Category: 
Keyword: 
under-defined multivariate quadratic equationsmultivariate public key cryptosystemthe unbalanced oil and vinegar signature scheme (UOV)
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