Katsuyuki Okeya

According to our database, Katsuyuki Okeya authored at least 52 papers between 2000 and 2010.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2010

Recursive Double-Size Modular Multiplications from Euclidean and Montgomery Multipliers.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Sole Inversion Precomputation for Elliptic Curve Scalar Multiplications.

Erik Dahmen, Katsuyuki Okeya

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010

Width-3 Joint Sparse Form.

Katsuyuki Okeya, Hidehiro Katou, Yasuyuki Nogami

Proceedings of the Information Security, 2010

2009

Bipartite modular multiplication with twice the bit-length of multipliers.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

Int. J. Inf. Sec., 2009

Faster Double-Size Bipartite Multiplication out of Montgomery Multipliers.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009

Recursive Double-Size Modular Multiplications without Extra Cost for Their Quotients.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

Proceedings of the Topics in Cryptology, 2009

2008

Short-Memory Scalar Multiplication for Koblitz Curves.

Camille Vuillaume, Katsuyuki Okeya, Tsuyoshi Takagi

IEEE Trans. Computers, 2008

Montgomery Multiplication with Twice the Bit-Length of Multipliers.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Side Channel Attacks against Hash-Based MACs with PGV Compression Functions.

Katsuyuki Okeya

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Public Key Authentication with Memory Tokens.

Camille Vuillaume, Katsuyuki Okeya, Erik Dahmen, Johannes Buchmann

Proceedings of the Information Security Applications, 9th International Workshop, 2008

Digital Signatures Out of Second-Preimage Resistant Hash Functions.

Erik Dahmen, Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

Proceedings of the Post-Quantum Cryptography, Second International Workshop, 2008

Side Channel Analysis of Some Hash Based MACs: A Response to SHA-3 Requirements.

Praveen Gauravaram, Katsuyuki Okeya

Proceedings of the Information and Communications Security, 10th International Conference, 2008

A Black Hen Lays White Eggs.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

Proceedings of the Smart Card Research and Advanced Applications, 2008

Skew Frobenius Map and Efficient Scalar Multiplication for Pairing-Based Cryptography.

Yumi Sakemi, Yasuyuki Nogami, Katsuyuki Okeya, Hidehiro Katou, Yoshitaka Morikawa

Proceedings of the Cryptology and Network Security, 7th International Conference, 2008

2007

A New Upper Bound for the Minimal Density of Joint Representations in Elliptic Curve Cryptosystems.

Erik Dahmen, Katsuyuki Okeya, Tsuyoshi Takagi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007

Affine Precomputation with Sole Inversion in Elliptic Curve Cryptography.

Erik Dahmen, Katsuyuki Okeya, Daniel Schepers

IACR Cryptol. ePrint Arch., 2007

An Update on the Side Channel Cryptanalysis of MACs Based on Cryptographic Hash Functions.

Praveen Gauravaram, Katsuyuki Okeya

Proceedings of the Progress in Cryptology, 2007

MAME: A Compression Function with Reduced Hardware Requirements.

Hirotaka Yoshida, Dai Watanabe, Katsuyuki Okeya, Jun Kitahara, Hongjun Wu, Özgül Küçük, Bart Preneel

Proceedings of the Cryptographic Hardware and Embedded Systems, 2007

Merkle Signatures with Virtually Unlimited Signature Capacity.

Johannes Buchmann, Erik Dahmen, Elena Klintsevich, Katsuyuki Okeya, Camille Vuillaume

Proceedings of the Applied Cryptography and Network Security, 5th International Conference, 2007

Double-Size Bipartite Modular Multiplication.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

Proceedings of the Information Security and Privacy, 12th Australasian Conference, 2007

2006

Side Channel Attacks on Message Authentication Codes.

Katsuyuki Okeya, Tetsu Iwata

Inf. Media Technol., 2006

Security analysis of CRT-based cryptosystems.

Katsuyuki Okeya, Tsuyoshi Takagi

Int. J. Inf. Sec., 2006

Defeating Simple Power Analysis on Koblitz Curves.

Camille Vuillaume, Katsuyuki Okeya, Tsuyoshi Takagi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

Security Analysis of the SPA-Resistant Fractional Width Method.

Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

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

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

Unbridle the Bit-Length of a Crypto-coprocessor with Montgomery Multiplication.

Masayuki Yoshino, Katsuyuki Okeya, Camille Vuillaume

Proceedings of the Selected Areas in Cryptography, 13th International Workshop, 2006

Generic Cryptanalysis of Combined Countermeasures with Randomized BSD Representations.

Tae Hyun Kim, Dong-Guk Han, Katsuyuki Okeya, Jongin Lim

Proceedings of the Smart Card Research and Advanced Applications, 2006

Flexible Exponentiation with Resistance to Side Channel Attacks.

Camille Vuillaume, Katsuyuki Okeya

Proceedings of the Applied Cryptography and Network Security, 4th International Conference, 2006

Side Channel Attacks Against HMACs Based on Block-Cipher Based Hash Functions.

Katsuyuki Okeya

Proceedings of the Information Security and Privacy, 11th Australasian Conference, 2006

2005

On the Importance of Protecting in SFLASH against Side Channel Attacks.

Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005

Cryptanalysis of Ha-Moon's Countermeasure of Randomized Signed Scalar Multiplication.

Katsuyuki Okeya, Dong-Guk Han

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005

An Advanced Method for Joint Scalar Multiplications on Memory Constraint Devices.

Erik Dahmen, Katsuyuki Okeya, Tsuyoshi Takagi

Proceedings of the Security and Privacy in Ad-hoc and Sensor Networks, 2005

Efficient Representations on Koblitz Curves with Resistance to Side Channel Attacks.

Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

Proceedings of the Information Security and Privacy, 10th Australasian Conference, 2005

2004

SCA-Resistant and Fast Elliptic Scalar Multiplication Based on wNAF.

Katsuyuki Okeya, Tsuyoshi Takagi

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2004

Signed Binary Representations Revisited.

Katsuyuki Okeya, Katja Schmidt-Samoa, Christian Spahn, Tsuyoshi Takagi

IACR Cryptol. ePrint Arch., 2004

On the Importance of Protecting Delta in SFLASH against Side Channel Attacks.

Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

Proceedings of the International Conference on Information Technology: Coding and Computing (ITCC'04), 2004

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

Proceedings of the Applied Cryptography and Network Security, 2004

On the Exact Flexibility of the Flexible Countermeasure Against Side Channel Attacks.

Katsuyuki Okeya, Tsuyoshi Takagi, Camille Vuillaume

Proceedings of the Information Security and Privacy: 9th Australasian Conference, 2004

2003

A Simple Power Attack on a Randomized Addition-Subtraction Chains Method for Elliptic Curve Cryptosystems.

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003

Use of Montgomery Trick in Precomputation of Multi-Scalar Multiplication in Elliptic Curve Cryptosystems.

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2003

A multiple power analysis breaks the advanced version of the randomized addition-subtraction chains countermeasure against side channel attacks.

Katsuyuki Okeya, Kouichi Sakurai

Proceedings of the Proceedings 2003 IEEE Information Theory Workshop, 2003

Side Channel Attack on Ha-Moon's Countermeasure of Randomized Signed Scalar Multiplication.

Katsuyuki Okeya, Dong-Guk Han

Proceedings of the Progress in Cryptology, 2003

The Width-w NAF Method Provides Small Memory and Fast Elliptic Scalar Multiplications Secure against Side Channel Attacks.

Katsuyuki Okeya, Tsuyoshi Takagi

Proceedings of the Topics in Cryptology, 2003

A More Flexible Countermeasure against Side Channel Attacks Using Window Method.

Katsuyuki Okeya, Tsuyoshi Takagi

Proceedings of the Cryptographic Hardware and Embedded Systems, 2003

2002

A Scalar Multiplication Algorithm with Recovery of the <i>y</i>-Coordinate on the Montgomery Form and Analysis of Efficiency for Elliptic Curve Cryptosystems.

Katsuyuki Okeya, Kouichi Sakurai

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002

A Second-Order DPA Attack Breaks a Window-Method Based Countermeasure against Side Channel Attacks.

Katsuyuki Okeya, Kouichi Sakurai

Proceedings of the Information Security, 5th International Conference, 2002

Fast Multi-scalar Multiplication Methods on Elliptic Curves with Precomputation Strategy Using Montgomery Trick.

Katsuyuki Okeya, Kouichi Sakurai

Proceedings of the Cryptographic Hardware and Embedded Systems, 2002

On Insecurity of the Side Channel Attack Countermeasure Using Addition-Subtraction Chains under Distinguishability between Addition and Doubling.

Katsuyuki Okeya, Kouichi Sakurai

Proceedings of the Information Security and Privacy, 7th Australian Conference, 2002

2001

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

Proceedings of the Information Security and Cryptology, 2001

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

Proceedings of the Cryptographic Hardware and Embedded Systems, 2001

2000

Elliptic Curves with the Montgomery-Form and Their Cryptographic Applications.

Katsuyuki Okeya, Hiroyuki Kurumatani, Kouichi Sakurai

Proceedings of the Public Key Cryptography, 2000

Power Analysis Breaks Elliptic Curve Cryptosystems even Secure against the Timing Attack.

Katsuyuki Okeya, Kouichi Sakurai

Proceedings of the Progress in Cryptology, 2000