IEICE Trans

Katsuyuki OKEYA

Sole Inversion Precomputation for Elliptic Curve Scalar Multiplications Erik DAHMEN Katsuyuki OKEYA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/06/01 Vol. E93-A No. 6 pp. 1140-1147 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Cryptography and Information Security Keyword: affine coordinates, elliptic curve cryptosystem, precomputation, scalar multiplication,
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Recursive Double-Size Modular Multiplications from Euclidean and Montgomery Multipliers Masayuki YOSHINO Katsuyuki OKEYA Camille VUILLAUME
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2010/01/01 Vol. E93-A No. 1 pp. 180-187 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Mathematics Keyword: modular multiplication, RSA, efficient implementation, low-end device, double-size technique,
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Faster Double-Size Bipartite Multiplication out of Montgomery Multipliers Masayuki YOSHINO Katsuyuki OKEYA Camille VUILLAUME
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2009/08/01 Vol. E92-A No. 8 pp. 1851-1858 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Theory Keyword: Montgomery multiplication, double-size technique, RSA, efficient implementation, smartcard,
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Side Channel Attacks against Hash-Based MACs with PGV Compression Functions Katsuyuki OKEYA
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 168-175 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Side Channel Attacks Keyword: (keyed) hash function, HMAC, NMAC, PGV construction, side channel attacks, differential power analysis (DPA), reverse DPA,
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Montgomery Multiplication with Twice the Bit-Length of Multipliers Masayuki YOSHINO Katsuyuki OKEYA Camille VUILLAUME
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2008/01/01 Vol. E91-A No. 1 pp. 203-210 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Implementation Keyword: Montgomery multiplication, RSA, crypto-coprocessor, smartcard,
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A New Upper Bound for the Minimal Density of Joint Representations in Elliptic Curve Cryptosystems Erik DAHMEN Katsuyuki OKEYA Tsuyoshi TAKAGI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2007/05/01 Vol. E90-A No. 5 pp. 952-959 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: elliptic curve cryptosystem, joint sparse form, left-to-right, multi-scalar multiplication, shamir method,
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Enhanced Exhaustive Search Attack on Randomized BSD Type Countermeasure Dong-Guk HAN Katsuyuki OKEYA Tae Hyun KIM Yoon Sung HWANG Beomin KIM Young-Ho PARK
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/05/01 Vol. E89-A No. 5 pp. 1316-1327 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: elliptic curve cryptosystem, side channel attacks, SPA, DPA, BSD representation, Ha-Moon countermeasure, Ebeid-Hasan countermeasure, Agagliate et al.'s countermeasure,
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Defeating Simple Power Analysis on Koblitz Curves Camille VUILLAUME Katsuyuki OKEYA Tsuyoshi TAKAGI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/05/01 Vol. E89-A No. 5 pp. 1362-1369 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: elliptic curve cryptosystems, Koblitz curves, smartcard, side channel attacks, SPA countermeasure,
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Security Analysis of the SPA-Resistant Fractional Width Method Katsuyuki OKEYA Tsuyoshi TAKAGI Camille VUILLAUME
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2006/01/01 Vol. E89-A No. 1 pp. 161-168 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Elliptic Curve Cryptography Keyword: elliptic curve cryptosystems, smartcard, fractional window, side channel attacks, flexibility, discrete logarithm problem,
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Cryptanalysis of Ha-Moon's Countermeasure of Randomized Signed Scalar Multiplication Katsuyuki OKEYA Dong-Guk HAN
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/05/01 Vol. E88-A No. 5 pp. 1140-1147 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: elliptic curve cryptosystems, side channel attacks, SPA, DPA, Ha-Moon's countermeasure, finite Markov chain,
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On the Importance of Protecting Δ in SFLASH against Side Channel Attacks Katsuyuki OKEYA Tsuyoshi TAKAGI Camille VUILLAUME
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2005/01/01 Vol. E88-A No. 1 pp. 123-131 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Tamper-Resistance Keyword: asymmetric signature, SFLASH, side channel attacks, SHA-1, C^, C^--, hidden monomial problem,
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SCA-Resistant and Fast Elliptic Scalar Multiplication Based on wNAF Katsuyuki OKEYA Tsuyoshi TAKAGI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2004/01/01 Vol. E87-A No. 1 pp. 75-84 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Asymmetric Cipher Keyword: elliptic curve cryptosystem, side channel attacks, width-w NAF, smart card,
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A Simple Power Attack on a Randomized Addition-Subtraction Chains Method for Elliptic Curve Cryptosystems Katsuyuki OKEYA Kouichi SAKURAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/05/01 Vol. E86-A No. 5 pp. 1171-1180 Type of Manuscript: Special Section PAPER (Special Section on Discrete Mathematics and Its Applications) Category: Keyword: elliptic curve cryptosystems, side channel attacks, randomized addition-subtraction chains countermeasure, SPA attack, timing attack,
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Use of Montgomery Trick in Precomputation of Multi-Scalar Multiplication in Elliptic Curve Cryptosystems Katsuyuki OKEYA Kouichi SAKURAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2003/01/01 Vol. E86-A No. 1 pp. 98-112 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Asymmetric Ciphers Keyword: elliptic curve cryptography, multi-scalar multiplication, precomputation, Montgomery trick, simultaneous,
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A Scalar Multiplication Algorithm with Recovery of the y-Coordinate on the Montgomery Form and Analysis of Efficiency for Elliptic Curve Cryptosystems Katsuyuki OKEYA Kouichi SAKURAI
Publication: IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences Publication Date: 2002/01/01 Vol. E85-A No. 1 pp. 84-93 Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security) Category: Keyword: elliptic curve cryptosystem, Montgomery form, fast scalar multiplication, y-coordinate recovery,
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