| 2010 | ISPEC | Width-3 Joint Sparse Form. | Katsuyuki Okeya, Hidehiro Katou, Yasuyuki Nogami |
| 2008 | CANS | Skew Frobenius Map and Efficient Scalar Multiplication for Pairing-Based Cryptography. | Yumi Sakemi, Yasuyuki Nogami, Katsuyuki Okeya, Hidehiro Katou, Yoshitaka Morikawa |
| 2008 | CARDIS | A Black Hen Lays White Eggs. | Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume |
| 2008 | ICICS | Side Channel Analysis of Some Hash Based MACs: A Response to SHA-3 Requirements. | Praveen Gauravaram, Katsuyuki Okeya |
| 2008 | PQCrypto | Digital Signatures Out of Second-Preimage Resistant Hash Functions. | Erik Dahmen, Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2008 | WISA | Public Key Authentication with Memory Tokens. | Camille Vuillaume, Katsuyuki Okeya, Erik Dahmen, Johannes Buchmann |
| 2007 | ACISP | Affine Precomputation with Sole Inversion in Elliptic Curve Cryptography. | Erik Dahmen, Katsuyuki Okeya, Daniel Schepers |
| 2007 | ACISP | Double-Size Bipartite Modular Multiplication. | Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume |
| 2007 | ACNS | Merkle Signatures with Virtually Unlimited Signature Capacity. | Johannes Buchmann, Erik Dahmen, Elena Klintsevich, Katsuyuki Okeya, Camille Vuillaume |
| 2007 | CHES | MAME: A Compression Function with Reduced Hardware Requirements. | Hirotaka Yoshida, Dai Watanabe, Katsuyuki Okeya, Jun Kitahara, Hongjun Wu, zgl Kk, Bart Preneel |
| 2007 | INDOCRYPT | An Update on the Side Channel Cryptanalysis of MACs Based on Cryptographic Hash Functions. | Praveen Gauravaram, Katsuyuki Okeya |
| 2006 | ACISP | Side Channel Attacks Against HMACs Based on Block-Cipher Based Hash Functions. | Katsuyuki Okeya |
| 2006 | ACNS | Flexible Exponentiation with Resistance to Side Channel Attacks. | Camille Vuillaume, Katsuyuki Okeya |
| 2006 | CARDIS | Generic Cryptanalysis of Combined Countermeasures with Randomized BSD Representations. | Tae Hyun Kim, Dong-Guk Han, Katsuyuki Okeya, Jongin Lim |
| 2005 | ACISP | Efficient Representations on Koblitz Curves with Resistance to Side Channel Attacks. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2005 | CHES | Short Memory Scalar Multiplication on Koblitz Curves. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2004 | ACISP | On the Exact Flexibility of the Flexible Countermeasure Against Side Channel Attacks. | Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume |
| 2004 | ACNS | Cryptanalysis of the Countermeasures Using Randomized Binary Signed Digits. | Dong-Guk Han, Katsuyuki Okeya, Tae Hyun Kim, Yoon Sung Hwang, Young-Ho Park, Souhwan Jung |
| 2004 | ACNS | Security Analysis of CRT-Based Cryptosystems. | Katsuyuki Okeya, Tsuyoshi Takagi |
| 2004 | CRYPTO | Signed Binary Representations Revisited. | Katsuyuki Okeya, Katja Schmidt-Samoa, Christian Spahn, Tsuyoshi Takagi |
| 2003 | CHES | A More Flexible Countermeasure against Side Channel Attacks Using Window Method. | Katsuyuki Okeya, Tsuyoshi Takagi |
| 2003 | INDOCRYPT | Side Channel Attack on Ha-Moon's Countermeasure of Randomized Signed Scalar Multiplication. | Katsuyuki Okeya, Dong-Guk Han |
| 2003 | ITW | A multiple power analysis breaks the advanced version of the randomized addition-subtraction chains countermeasure against side channel attacks. | Katsuyuki Okeya, Kouichi Sakurai |
| 2002 | ACISP | On Insecurity of the Side Channel Attack Countermeasure Using Addition-Subtraction Chains under Distinguishability between Addition and Doubling. | Katsuyuki Okeya, Kouichi Sakurai |
| 2002 | CHES | Fast Multi-scalar Multiplication Methods on Elliptic Curves with Precomputation Strategy Using Montgomery Trick. | Katsuyuki Okeya, Kouichi Sakurai |
| 2001 | CHES | Efficient Elliptic Curve Cryptosystems from a Scalar Multiplication Algorithm with Recovery of the y-Coordinate on a Montgomery-Form Elliptic Curve. | Katsuyuki Okeya, Kouichi Sakurai |
| 2001 | ICISC | A Fast Scalar Multiplication Method with Randomized Projective Coordinates on a Montgomery-Form Elliptic Curve Secure against Side Channel Attacks. | Katsuyuki Okeya, Kunihiko Miyazaki, Kouichi Sakurai |
| 2000 | INDOCRYPT | Power Analysis Breaks Elliptic Curve Cryptosystems even Secure against the Timing Attack. | Katsuyuki Okeya, Kouichi Sakurai |
| 2000 | PKC | Elliptic Curves with the Montgomery-Form and Their Cryptographic Applications. | Katsuyuki Okeya, Hiroyuki Kurumatani, Kouichi Sakurai |