Takeshi Shimoyama

Publication Activity (10 Years)

Years Active: 1994-2021
Publications (10 Years): 7

Top Topics

Chosen Ciphertext

Computationally Tractable

Top Venues

J. Math. Cryptol.

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

Publications

Rikuhiro Kojima, Dai Yamamoto, Takeshi Shimoyama, Kouichi Yasaki, Kazuaki Nimura
A New Schnorr Multi-Signatures to Support Both Multiple Messages Signing and Key Aggregation. J. Inf. Process. 29 (2021)
Rikuhiro Kojima, Dai Yamamoto, Takeshi Shimoyama, Kouichi Yasaki, Kazuaki Nimura
A Novel Scheme of Schnorr Multi-signatures for Multiple Messages with Key Aggregation. BWCCA (2020)
Goichiro Hanaoka, Yusuke Sakai, Toshiya Shimizu, Takeshi Shimoyama, SeongHan Shin
A Setup-Free Threshold Encryption Scheme for the Bitcoin Protocol and Its Applications. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2020)
Toshiya Shimizu, Takeshi Shimoyama
Block Cipher Modes of Operation for Heterogeneous Format Preserving Encryption. ISPEC (2017)
Masaya Yasuda, Kazuhiro Yokoyama, Takeshi Shimoyama, Jun Kogure, Takeshi Koshiba
Analysis of decreasing squared-sum of Gram-Schmidt lengths for short lattice vectors. J. Math. Cryptol. 11 (1) (2017)
Masaya Yasuda, Takeshi Shimoyama, Masahiko Takenaka, Narishige Abe, Shigefumi Yamada, Junpei Yamaguchi
Recovering Attacks Against Linear Sketch in Fuzzy Signature Schemes of ACNS 2015 and 2016. ISPEC (2017)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Tetsuya Izu
Computational hardness of IFP and ECDLP. Appl. Algebra Eng. Commun. Comput. 27 (6) (2016)
Masaya Yasuda, Takeshi Shimoyama, Narishige Abe, Shigefumi Yamada, Takashi Shinzaki, Takeshi Koshiba
Privacy-Preserving Fuzzy Commitment for Biometrics via Layered Error-Correcting Codes. FPS (2015)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
New packing method in somewhat homomorphic encryption and its applications. Secur. Commun. Networks 8 (13) (2015)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
Secure Statistical Analysis Using RLWE-Based Homomorphic Encryption. ACISP (2015)
Masaya Yasuda, Takeshi Koshiba, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama
Secure Data Devolution: Practical Re-encryption with Auxiliary Data in LWE-based Somewhat Homomorphic Encryption. SCC@ASIACCS (2015)
Masaya Yasuda, Kazuhiro Yokoyama, Takeshi Shimoyama, Jun Kogure, Takeshi Koshiba
On the exact decryption range for Gentry-Halevi's implementation of fully homomorphic encryption. J. Math. Cryptol. 8 (3) (2014)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
Privacy-Preserving Wildcards Pattern Matching Using Symmetric Somewhat Homomorphic Encryption. ACISP (2014)
Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi
). IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2014)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
Practical Packing Method in Somewhat Homomorphic Encryption. DPM/SETOP (2013)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
Secure pattern matching using somewhat homomorphic encryption. CCSW (2013)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba
Packed Homomorphic Encryption Based on Ideal Lattices and Its Application to Biometrics. CD-ARES Workshops (2013)
Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi
Pairing. IACR Cryptol. ePrint Arch. 2012 (2012)
Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama
Preimage Attacks on the Step-Reduced RIPEMD-128 and RIPEMD-160. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (10) (2012)
Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi
). IACR Cryptol. ePrint Arch. 2012 (2012)
Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi
Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397). ASIACRYPT (2012)
Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi
Key Length Estimation of Pairing-Based Cryptosystems Using η T Pairing. ISPEC (2012)
Masaya Yasuda, Jun Yajima, Takeshi Shimoyama, Jun Kogure
Analysis of Lattice Reduction Attack against the Somewhat Homomorphic Encryption Based on Ideal Lattices. EuroPKI (2012)
Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Tetsuya Izu
On the Strength Comparison of the ECDLP and the IFP. SCN (2012)
Chiaki Ohtahara, Keita Okada, Yu Sasaki, Takeshi Shimoyama
Preimage Attacks on Full-ARIRANG (Poster). ACISP (2011)
Chiaki Ohtahara, Keita Okada, Yu Sasaki, Takeshi Shimoyama
Preimage Attacks on Full-ARIRANG: Analysis of DM-Mode with Middle Feed-Forward. WISA (2011)
Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama
Preimage Attacks on Step-Reduced RIPEMD-128 and RIPEMD-160. Inscrypt (2010)
Jun Yajima, Takeshi Shimoyama
Matrix Representation of Conditions for the Collision Attack of SHA-1 and Its Application to the Message Modification. IWSEC (2010)
Kazumasa Omote, Takeshi Shimoyama, Satoru Torii
A Combinatorics Proliferation Model with Threshold for Malware Countermeasure. J. Inf. Process. 18 (2010)
Tetsuya Izu, Jun Kogure, Takeshi Shimoyama
CAIRN: Dedicated Integer Factoring Devices. NBiS (2010)
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 Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2009)
Kouichi Itoh, Tetsuya Izu, Wakaha Ogata, Takeshi Shimoyama, Masahiko Takenaka
Forgery Attacks on Time-Stamp, Signed PDF and X.509 Certificate. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2009)
Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka
Extending Bleichenbacher's Forgery Attack. Inf. Media Technol. 3 (4) (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)
Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka
Extending Bleichenbacher's Forgery Attack. J. Inf. Process. 16 (2008)
Kazumasa Omote, Takeshi Shimoyama, Satoru Torii
Timing to Block Scanning Malwares by Using Combinatorics Proliferation Model. ICETE (Selected Papers) (2007)
Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka
How to Forge a Time-Stamp Which Adobe's Acrobat Accepts. IMACC (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 Trans. Electron. (8) (2007)
Tetsuya Izu, Masahiko Takenaka, Takeshi Shimoyama
Analysis on Bleichenbacher's Forgery Attack. ARES (2007)
Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama
Low-density attack revisited. Des. Codes Cryptogr. 43 (1) (2007)
Kazumaro Aoki, Takeshi Shimoyama, Hiroki Ueda
Experiments on the Linear Algebra Step in the Number Field Sieve. IWSEC (2007)
Tetsuya Izu, Jun Kogure, Takeshi Shimoyama
CAIRN 2: An FPGA Implementation of the Sieving Step in the Number Field Sieve Method. CHES (2007)
Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama
Low-Density Attack Revisited. IACR Cryptol. ePrint Arch. 2007 (2007)
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)
Kazumasa Omote, Takeshi Shimoyama, Satoru Torii
A Combinatorics Proliferation Model to Determine the Timing for Blocking Scanning Malware. SECRYPT (2007)
Takeshi Shimoyama, Yoichi Muraoka
Two Methods for Speeding Up Similarity Measurement for Profile Data. IKE (2007)
Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta
How to Construct Sufficient Condition in Searching Collisions of MD5. IACR Cryptol. ePrint Arch. 2006 (2006)
Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta
Message Modification for Step 21-23 on SHA-0. IACR Cryptol. ePrint Arch. 2006 (2006)
Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta
Improved Collision Search for SHA-0. ASIACRYPT (2006)
Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta
How to Construct Sufficient Conditions for Hash Functions. VIETCRYPT (2006)
Jun Yajima, Takeshi Shimoyama
Wang's sufficient conditions of MD5 are not sufficient. IACR Cryptol. ePrint Arch. 2005 (2005)
Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Takeshi Shimoyama
Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices. WISA (2005)
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 Trans. Electron. (8) (2005)
Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba
Attack on RC6. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2004)
Kazumaro Aoki, Yuji Kida, Takeshi Shimoyama, Hiroki Ueda
GNFS Factoring Statistics of RSA-100, 110, ..., 150. IACR Cryptol. ePrint Arch. 2004 (2004)
Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba
Attack on RC6. ACISP (2003)
Hitoshi Yanami, Takeshi Shimoyama, Orr Dunkelman
Differential and Linear Cryptanalysis of a Reduced-Round SC2000. FSE (2002)
Takeshi Shimoyama, Masahiko Takenaka, Takeshi Koshiba
Multiple Linear Cryptanalysis of a Reduced Round RC6. FSE (2002)
Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba
Theoretical Analysis of "Correlations in RC6". IACR Cryptol. ePrint Arch. 2002 (2002)
Hitoshi Yanami, Takeshi Shimoyama
Differential Cryptanalysis of a Reduced-Round SEED. SCN (2002)
Takeshi Shimoyama, Hitoshi Yanami, Kazuhiro Yokoyama, Masahiko Takenaka, Kouichi Itoh, Jun Yajima, Naoya Torii, Hidema Tanaka
The Block Cipher SC2000. FSE (2001)
Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko
Interpolation Attacks of the Block Cipher: SNAKE. FSE (1999)
Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko
Higher Order Differential Attak of CAST Cipher. FSE (1998)
Takeshi Shimoyama, Toshinobu Kaneko
Quadratic Relation of S-box and Its Application to the Linear Attack of Full Round DES. CRYPTO (1998)
Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko
Higher Order Differential Attack Using Chosen Higher Order Differences. Selected Areas in Cryptography (1998)
Takeshi Shimoyama, Seiichi Amada, Shiho Moriai
Improved fast software implementation of block ciphers. ICICS (1997)
Takeshi Shimoyama, Shiho Moriai, Toshinobu Kaneko
Cipher. ISW (1997)
Takeshi Shimoyama, Kazuhiro Yokoyama
Localization and Primary Decomposition of Polynomial Ideals. J. Symb. Comput. 22 (3) (1996)
Toshinori Oaku, Takeshi Shimoyama
A Gröbner Basis Method for Modules over Rings of Differential Operators. J. Symb. Comput. 18 (3) (1994)