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ORCIDTakeshi Shimoyama
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2020 – today
- 2021
[j20]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: 525-536 (2021)- 2020
- [j19]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. 103-A(1): 150-164 (2020) - [c42]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: 284-295
2010 – 2019
- 2017
- [j18]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): 1-24 (2017) - [c41]Toshiya Shimizu, Takeshi Shimoyama:
Block Cipher Modes of Operation for Heterogeneous Format Preserving Encryption. ISPEC 2017: 256-275 - [c40]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: 409-421 - 2016
- [j17]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Tetsuya Izu:
Computational hardness of IFP and ECDLP. Appl. Algebra Eng. Commun. Comput. 27(6): 493-521 (2016) - 2015
- [j16]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): 2194-2213 (2015) - [c39]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba:
Secure Statistical Analysis Using RLWE-Based Homomorphic Encryption. ACISP 2015: 471-487 - [c38]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: 53-61 - [c37]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: 117-133 - 2014
- [j15]Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi:
Key Length Estimation of Pairing-Based Cryptosystems Using ηT Pairing over GF(3n). IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 97-A(1): 236-244 (2014) - [j14]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): 305-329 (2014) - [c36]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba:
Privacy-Preserving Wildcards Pattern Matching Using Symmetric Somewhat Homomorphic Encryption. ACISP 2014: 338-353 - 2013
- [c35]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: 55-74 - [c34]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba:
Secure pattern matching using somewhat homomorphic encryption. CCSW 2013: 65-76 - [c33]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Kazuhiro Yokoyama, Takeshi Koshiba:
Practical Packing Method in Somewhat Homomorphic Encryption. DPM/SETOP 2013: 34-50 - 2012
- [j13]Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama:
Preimage Attacks on the Step-Reduced RIPEMD-128 and RIPEMD-160. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 95-A(10): 1729-1739 (2012) - [c32]Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi:
Breaking Pairing-Based Cryptosystems Using η T Pairing over GF(397). ASIACRYPT 2012: 43-60 - [c31]Masaya Yasuda, Jun Yajima, Takeshi Shimoyama, Jun Kogure:
Analysis of Lattice Reduction Attack against the Somewhat Homomorphic Encryption Based on Ideal Lattices. EuroPKI 2012: 1-16 - [c30]Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi:
Key Length Estimation of Pairing-Based Cryptosystems Using η T Pairing. ISPEC 2012: 228-244 - [c29]Masaya Yasuda, Takeshi Shimoyama, Jun Kogure, Tetsuya Izu:
On the Strength Comparison of the ECDLP and the IFP. SCN 2012: 302-325 - [i8]Naoyuki Shinohara, Takeshi Shimoyama, Takuya Hayashi, Tsuyoshi Takagi:
Key Length Estimation of Pairing-based Cryptosystems using ηT Pairing. IACR Cryptol. ePrint Arch. 2012: 42 (2012) - [i7]Takuya Hayashi, Takeshi Shimoyama, Naoyuki Shinohara, Tsuyoshi Takagi:
Breaking pairing-based cryptosystems using ηT pairing over GF(397). IACR Cryptol. ePrint Arch. 2012: 345 (2012) - 2011
- [c28]Chiaki Ohtahara, Keita Okada, Yu Sasaki, Takeshi Shimoyama:
Preimage Attacks on Full-ARIRANG (Poster). ACISP 2011: 417-422 - [c27]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 - 2010
- [j12]Kazumasa Omote, Takeshi Shimoyama, Satoru Torii:
A Combinatorics Proliferation Model with Threshold for Malware Countermeasure. Inf. Media Technol. 5(2): 765-775 (2010) - [j11]Kazumasa Omote, Takeshi Shimoyama, Satoru Torii:
A Combinatorics Proliferation Model with Threshold for Malware Countermeasure. J. Inf. Process. 18: 77-87 (2010) - [c26]Chiaki Ohtahara, Yu Sasaki, Takeshi Shimoyama:
Preimage Attacks on Step-Reduced RIPEMD-128 and RIPEMD-160. Inscrypt 2010: 169-186 - [c25]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 - [c24]Tetsuya Izu, Jun Kogure, Takeshi Shimoyama:
CAIRN: Dedicated Integer Factoring Devices. NBiS 2010: 558-563
2000 – 2009
- 2009
- [j10]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. 92-A(1): 67-75 (2009) - [j9]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. 92-A(1): 87-95 (2009) - 2008
- [j8]Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka:
Extending Bleichenbacher's Forgery Attack. Inf. Media Technol. 3(4): 780-787 (2008) - [j7]Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka:
Extending Bleichenbacher's Forgery Attack. J. Inf. Process. 16: 122-129 (2008) - [c23]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 - 2007
- [j6]Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama:
Low-density attack revisited. Des. Codes Cryptogr. 43(1): 47-59 (2007) - [j5]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. 90-C(8): 1634-1642 (2007) - [c22]Tetsuya Izu, Masahiko Takenaka, Takeshi Shimoyama:
Analysis on Bleichenbacher's Forgery Attack. ARES 2007: 1167-1174 - [c21]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 - [c20]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 - [c19]Kazumasa Omote, Takeshi Shimoyama, Satoru Torii:
Timing to Block Scanning Malwares by Using Combinatorics Proliferation Model. ICETE (Selected Papers) 2007: 125-138 - [c18]Takeshi Shimoyama, Yoichi Muraoka:
Two Methods for Speeding Up Similarity Measurement for Profile Data. IKE 2007: 67-71 - [c17]Tetsuya Izu, Takeshi Shimoyama, Masahiko Takenaka:
How to Forge a Time-Stamp Which Adobe's Acrobat Accepts. IMACC 2007: 54-72 - [c16]Kazumaro Aoki, Takeshi Shimoyama, Hiroki Ueda:
Experiments on the Linear Algebra Step in the Number Field Sieve. IWSEC 2007: 58-73 - [c15]Kazumasa Omote, Takeshi Shimoyama, Satoru Torii:
A Combinatorics Proliferation Model to Determine the Timing for Blocking Scanning Malware. SECRYPT 2007: 16-24 - [i6]Tetsuya Izu, Jun Kogure, Takeshi Koshiba, Takeshi Shimoyama:
Low-Density Attack Revisited. IACR Cryptol. ePrint Arch. 2007: 66 (2007) - 2006
- [c14]Yusuke Naito, Yu Sasaki, Takeshi Shimoyama, Jun Yajima, Noboru Kunihiro, Kazuo Ohta:
Improved Collision Search for SHA-0. ASIACRYPT 2006: 21-36 - [c13]Yu Sasaki, Yusuke Naito, Jun Yajima, Takeshi Shimoyama, Noboru Kunihiro, Kazuo Ohta:
How to Construct Sufficient Conditions for Hash Functions. VIETCRYPT 2006: 243-259 - [i5]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: 16 (2006) - [i4]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: 74 (2006) - 2005
- [j4]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. 88-C(8): 1675-1681 (2005) - [c12]Tetsuya Izu, Noboru Kunihiro, Kazuo Ohta, Takeshi Shimoyama:
Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices. WISA 2005: 232-242 - [i3]Jun Yajima, Takeshi Shimoyama:
Wang's sufficient conditions of MD5 are not sufficient. IACR Cryptol. ePrint Arch. 2005: 263 (2005) - 2004
- [j3]Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba:
Theoretical Analysis of chi2 Attack on RC6. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 87-A(1): 28-36 (2004) - [i2]Kazumaro Aoki, Yuji Kida, Takeshi Shimoyama, Hiroki Ueda:
GNFS Factoring Statistics of RSA-100, 110, ..., 150. IACR Cryptol. ePrint Arch. 2004: 95 (2004) - 2003
- [c11]Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba:
Theoretical Analysis of chi2 Attack on RC6. ACISP 2003: 142-153 - 2002
- [c10]Hitoshi Yanami, Takeshi Shimoyama, Orr Dunkelman:
Differential and Linear Cryptanalysis of a Reduced-Round SC2000. FSE 2002: 34-48 - [c9]Takeshi Shimoyama, Masahiko Takenaka, Takeshi Koshiba:
Multiple Linear Cryptanalysis of a Reduced Round RC6. FSE 2002: 76-88 - [c8]Hitoshi Yanami, Takeshi Shimoyama:
Differential Cryptanalysis of a Reduced-Round SEED. SCN 2002: 186-198 - [i1]Masahiko Takenaka, Takeshi Shimoyama, Takeshi Koshiba:
Theoretical Analysis of "Correlations in RC6". IACR Cryptol. ePrint Arch. 2002: 176 (2002) - 2001
- [c7]Takeshi Shimoyama, Hitoshi Yanami, Kazuhiro Yokoyama, Masahiko Takenaka, Kouichi Itoh, Jun Yajima, Naoya Torii, Hidema Tanaka:
The Block Cipher SC2000. FSE 2001: 312-327
1990 – 1999
- 1999
- [c6]Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko:
Interpolation Attacks of the Block Cipher: SNAKE. FSE 1999: 275-289 - 1998
- [c5]Takeshi Shimoyama, Toshinobu Kaneko:
Quadratic Relation of S-box and Its Application to the Linear Attack of Full Round DES. CRYPTO 1998: 200-211 - [c4]Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko:
Higher Order Differential Attak of CAST Cipher. FSE 1998: 17-31 - [c3]Shiho Moriai, Takeshi Shimoyama, Toshinobu Kaneko:
Higher Order Differential Attack Using Chosen Higher Order Differences. Selected Areas in Cryptography 1998: 106-117 - 1997
- [c2]Takeshi Shimoyama, Seiichi Amada, Shiho Moriai:
Improved fast software implementation of block ciphers. ICICS 1997: 269-273 - [c1]Takeshi Shimoyama, Shiho Moriai, Toshinobu Kaneko:
Improving the Higher Order Differential Attack and Cryptanalysis of the KN Cipher. ISW 1997: 32-42 - 1996
- [j2]Takeshi Shimoyama, Kazuhiro Yokoyama:
Localization and Primary Decomposition of Polynomial Ideals. J. Symb. Comput. 22(3): 247-277 (1996) - 1994
- [j1]Toshinori Oaku, Takeshi Shimoyama:
A Gröbner Basis Method for Modules over Rings of Differential Operators. J. Symb. Comput. 18(3): 223-248 (1994)
Coauthor Index
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