Takeshi Shimoyama

Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama: Preimage Attacks on the Step-Reduced RIPEMD-128 and RIPEMD-160. IEICE Transactions 95-A(10): 1729-1739 (2012)

Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi: Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397). ASIACRYPT 2012: 43-60

Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi: Key Length Estimation of Pairing-Based Cryptosystems Using η T Pairing. ISPEC 2012: 228-244

Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Tetsuya Izu: On the Strength Comparison of the ECDLP and the IFP. SCN 2012: 302-325

Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi: Key Length Estimation of Pairing-based Cryptosystems using $\eta_T$ Pairing. IACR Cryptology ePrint Archive 2012: 42 (2012)

Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi: Breaking pairing-based cryptosystems using $\eta_T$ pairing over $GF(3^{97})$. IACR Cryptology ePrint Archive 2012: 345 (2012)

Chiaki Ohtahara, Keita Okada, Yu Sasaki, Takeshi Shimoyama: Preimage Attacks on Full-ARIRANG (Poster). ACISP 2011: 417-422

Chiaki Ohtahara, Keita Okada, Yu Sasaki, Takeshi Shimoyama: Preimage Attacks on Full-ARIRANG: Analysis of DM-Mode with Middle Feed-Forward. WISA 2011: 40-54

Kazumasa Omote, Takeshi Shimoyama, Satoru Torii: A Combinatorics Proliferation Model with Threshold for Malware Countermeasure. JIP 18: 77-87 (2010)

Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama: Preimage Attacks on Step-Reduced RIPEMD-128 and RIPEMD-160. Inscrypt 2010: 169-186

Jun Yajima, Takeshi Shimoyama: Matrix Representation of Conditions for the Collision Attack of SHA-1 and Its Application to the Message Modification. IWSEC 2010: 267-284

Tetsuya Izu, Jun Kogure, Takeshi Shimoyama: CAIRN: Dedicated Integer Factoring Devices. NBiS 2010: 558-563

Kouichi Itoh, Tetsuya Izu, Wakaha Ogata, Takeshi Shimoyama, Masahiko Takenaka: Forgery Attacks on Time-Stamp, Signed PDF and X.509 Certificate. IEICE Transactions 92-A(1): 67-75 (2009)

Jun Yajima, Terutoshi Iwasaki, Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Thomas Peyrin, Noboru Kunihiro, Kazuo Ohta: A Strict Evaluation on the Number of Conditions for SHA-1 Collision Search. IEICE Transactions 92-A(1): 87-95 (2009)

Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka: Extending Bleichenbacher's Forgery Attack. JIP 16: 122-129 (2008)

Jun Yajima, Terutoshi Iwasaki, Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta: A strict evaluation method on the number of conditions for the SHA-1 collision search. ASIACCS 2008: 10-20

Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama: Low-density attack revisited. Des. Codes Cryptography 43(1): 47-59 (2007)

Ryoichi Honbo, Youichi Murakami, Koichiro Sawa, Hiroyuki Wakabayashi, Naruhiko Inayoshi, Kyoji Inukai, Takeshi Shimoyama, Naoki Morita: Development of the Lead-Free Brush Material for the High-Load Starter. IEICE Transactions 90-C(8): 1634-1642 (2007)

Tetsuya Izu, Masahiko Takenaka, Takeshi Shimoyama: Analysis on Bleichenbacher's Forgery Attack. ARES 2007: 1167-1174

Jun Yajima, Yu Sasaki, Yusuke Naito, Terutoshi Iwasaki, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta: A New Strategy for Finding a Differential Path of SHA-1. ACISP 2007: 45-58

Tetsuya Izu, Jun Kogure, Takeshi Shimoyama: CAIRN 2: An FPGA Implementation of the Sieving Step in the Number Field Sieve Method. CHES 2007: 364-377

Takeshi Shimoyama, Yoichi Muraoka: Two Methods for Speeding Up Similarity Measurement for Profile Data. IKE 2007: 67-71

Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka: How to Forge a Time-Stamp Which Adobe's Acrobat Accepts. IMA Int. Conf. 2007: 54-72

Kazumaro Aoki, Takeshi Shimoyama, Hiroki Ueda: Experiments on the Linear Algebra Step in the Number Field Sieve. IWSEC 2007: 58-73

Kazumasa Omote, Takeshi Shimoyama, Satoru Torii: A Combinatorics Proliferation Model to Determine the Timing for Blocking Scanning Malware. SECRYPT 2007: 16-24

Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama: Low-Density Attack Revisited. IACR Cryptology ePrint Archive 2007: 66 (2007)

Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta: Improved Collision Search for SHA-0. ASIACRYPT 2006: 21-36

Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta: How to Construct Sufficient Conditions for Hash Functions. VIETCRYPT 2006: 243-259

Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta: Message Modification for Step 21-23 on SHA-0. IACR Cryptology ePrint Archive 2006: 16 (2006)

Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta: How to Construct Sufficient Condition in Searching Collisions of MD5. IACR Cryptology ePrint Archive 2006: 74 (2006)

Ryoichi Honbo, Koichiro Sawa, Youichi Murakami, Hiroyuki Wakabayashi, Naruhiko Inayoshi, Kyoji Inukai, Takeshi Shimoyama, Naoki Morita: Development of the Lead-Free Carbon Brush Material for Starters. IEICE Transactions 88-C(8): 1675-1681 (2005)

Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Takeshi Shimoyama: Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices. WISA 2005: 232-242

Jun Yajima, Takeshi Shimoyama: Wang's sufficient conditions of MD5 are not sufficient. IACR Cryptology ePrint Archive 2005: 263 (2005)

Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba: Theoretical Analysis of chi² Attack on RC6. IEICE Transactions 87-A(1): 28-36 (2004)

Kazumaro Aoki, Yuji Kida, Takeshi Shimoyama, Hiroki Ueda: GNFS Factoring Statistics of RSA-100, 110, ..., 150. IACR Cryptology ePrint Archive 2004: 95 (2004)

Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba: Theoretical Analysis of chi² Attack on RC6. ACISP 2003: 142-153

Hitoshi Yanami, Takeshi Shimoyama, Orr Dunkelman: Differential and Linear Cryptanalysis of a Reduced-Round SC2000. FSE 2002: 34-48

Takeshi Shimoyama, Masahiko Takenaka, Takeshi Koshiba: Multiple Linear Cryptanalysis of a Reduced Round RC6. FSE 2002: 76-88

Hitoshi Yanami, Takeshi Shimoyama: Differential Cryptanalysis of a Reduced-Round SEED. SCN 2002: 186-198

Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba: Theoretical Analysis of "Correlations in RC6". IACR Cryptology ePrint Archive 2002: 176 (2002)

Takeshi Shimoyama, Hitoshi Yanami, Kazuhiro Yokoyama, Masahiko Takenaka, Kouichi Itoh, Jun Yajima, Naoya Torii, Hidema Tanaka: The Block Cipher SC2000. FSE 2001: 312-327

Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko: Interpolation Attacks of the Block Cipher: SNAKE. FSE 1999: 275-289

Takeshi Shimoyama, Toshinobu Kaneko: Quadratic Relation of S-box and Its Application to the Linear Attack of Full Round DES. CRYPTO 1998: 200-211

Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko: Higher Order Differential Attak of CAST Cipher. FSE 1998: 17-31

Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko: Higher Order Differential Attack Using Chosen Higher Order Differences. Selected Areas in Cryptography 1998: 106-117

Takeshi Shimoyama, Seiichi Amada, Shiho Moriai: Improved fast software implementation of block ciphers. ICICS 1997: 269-273

Takeshi Shimoyama, Shiho Moriai, Toshinobu Kaneko: Improving the Higher Order Differential Attack and Cryptanalysis of the KN Cipher. ISW 1997: 32-42

Takeshi Shimoyama, Kazuhiro Yokoyama: Localization and Primary Decomposition of Polynomial Ideals. J. Symb. Comput. 22(3): 247-277 (1996)

Toshinori Oaku, Takeshi Shimoyama: A Gröbner Basis Method for Modules over Rings of Differential Operators. J. Symb. Comput. 18(3): 223-248 (1994)