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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| ISEC | 2008-09-12 16:10 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | The security analysis using meta-reduction under several computational assumptions in the case of ElGamal encryption Yutaka Kawai, Kazuo Ohta (UEC)  ISEC2008-70 |
[more] | ISEC2008-70 pp.47-54 |
| ISEC | 2008-05-16 13:00 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Reconsideration of Algorithmic Tamper Proof Devices using PIN (part 2) Yuichi Komano (Toshiba), Kazuo Ohta (UEC), Hideyuki Miyake, Atsushi Shimbo (Toshiba) ISEC2008-7 |
Gennaro et al.~discussed the algorithmic tamper proof (ATP) devices using the personal identification number (PIN); and ... [more] | ISEC2008-7 pp.43-48 |
| ISEC, IT, WBS | 2008-02-28 11:10 |
Tokyo | Random Oracle Model with Inspection of Hash List Kazuki Yoneyama, Satoshi Miyagawa, Kazuo Ohta (UEC) IT2007-34 ISEC2007-131 WBS2007-65 |
[more] | IT2007-34 ISEC2007-131 WBS2007-65 pp.15-21 |
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| ISEC, IT, WBS | 2008-02-29 14:15 |
Tokyo | A proposal of modified multi ring signature Mitsuaki Ikeda, Yutaka Kawai, Kazuo Ohta (UEC) IT2007-58 ISEC2007-155 WBS2007-89 |
The $k$-out-of-$n$ signature is a signature scheme where $k$ real signers among $n$ signers corporate in signature gene... [more] |
IT2007-58 ISEC2007-155 WBS2007-89 pp.65-71 |
|
| ISEC | 2007-12-19 16:10 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Attribute-Based Encryption with Partially Hidden Ciphertext Policies Takashi Nishide (Univ. of Electro-Comm./Hitachi Software), Kazuki Yoneyama, Kazuo Ohta (Univ. of Electro-Comm.) ISEC2007-125 |
We propose an attribute-based encryption scheme where encryptor-specified policies are hidden. By using our scheme, an... [more] |
ISEC2007-125 pp.93-100 |
| SITE | 2007-11-02 15:05 |
Tokyo | University of Electro-Communications | Legal consideration on cryptographic research-groups' actions in case of finding vulnerability Yusuke Inomata, Kazuo Ohta, Noboru Kunihiro (UEC) SITE2007-42 |
We consider a research-group’s action in a case of finding a vulnerability of cryptographic protocol and/or products. W... [more] | SITE2007-42 pp.15-20 |
| ISEC | 2007-09-07 15:45 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | An Approach to Duality in Public Key Cryptosystems Kazuo Ohta (UEC), Yuichi Komano (Toshiba), Yutaka Kawai (UEC), Shinichi Kawamura (Toshiba) ISEC2007-87 |
The security of cryptosystems is formalized by the combination of adversarial goal GOAL and attack model ATK. Paillier a... [more] | ISEC2007-87 pp.99-106 |
| ISEC, SITE, IPSJ-CSEC | 2007-07-20 16:10 |
Hokkaido | Future University-Hakodate | An Extension of Sanitizable and Deletable Signature Masami Izumi (UEC), Tetsuya Izu (FUJITSU Lab.), Noboru Kunihiro, Kazuo Ohta (UEC) ISEC2007-67 |
Sanitizable or deletable signatures attract much attention because of their privacy-perserving property in which after ... [more] |
ISEC2007-67 pp.147-154 |
| ISEC | 2007-05-18 14:05 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Consideration on security of digital signatures from the view of Paillier's framework Yutaka Kawai, Kazuo Ohta, Noboru Kunihiro (UEC) ISEC2007-9 |
In the dawn of the research on public key cryptosystem，「There is a certain scheme such that if the scheme proven secure ... [more] | ISEC2007-9 pp.57-64 |
| IT, ISEC, WBS | 2007-03-15 17:20 |
Gunma | Gunma Univ. (Kiryu Campus) | New Definition of Density on Knapsack Cryptosystems Noboru Kunihiro, Keisuke Kitahara, Kazuo Ohta (UEC) |
[more] | IT2006-77 ISEC2006-132 WBS2006-74 pp.93-98 |
| IT, ISEC, WBS | 2007-03-16 08:30 |
Gunma | Gunma Univ. (Kiryu Campus) | On the Security of Secret Handshake Kazuki Yoneyama, Yutaka Kawai, Takahiro Kondo, Kazuo Ohta, Noboru Kunihiro (UEC) |
[more] | IT2006-93 ISEC2006-148 WBS2006-90 pp.47-52 |
| IT, ISEC, WBS | 2007-03-16 11:35 |
Gunma | Gunma Univ. (Kiryu Campus) | The proposal of low-processing load authentication method for two parties using disposable ID Kazuo Fushimi, Noboru Kunihiro, Kazuo Ohta (UEC) |
An authentication method for two parties using fixed ID is not enough to deal with the apprehensiveness against leaking ... [more] | IT2006-100 ISEC2006-155 WBS2006-97 pp.87-92 |
| ISEC, LOIS | 2005-11-15 13:15 |
Fukuoka | Kitakyushu Science and Research Park | Improved Collision Attack on MD5 Yu Sasaki, Yusuke Naito, Noboru Kunihiro, Kazuo Ohta (Univ. of Electro-Comm.) |
In EUROCRYPT2005, a collision attack on MD5 was proposed by Wang et al. In this attack, conditions which are sufficien... [more] |
ISEC2005-104 OIS2005-67 pp.35-42 |
| ISEC, IPSJ-CSEC, SITE | 2005-07-22 14:15 |
Iwate | Iwate Prefectural University | Analysis on the Clockwise Transposition Routing for Dedicated Factoring Devices Tetsuya Izu (FUJITSU Lab./Univ. of Electro-Comm.), Noboru Kunihiro, Kazuo Ohta (Univ. of Electro-Comm.), Takeshi Shimoyama (FUJITSU Lab.) |
Recently, dedicated factoring devices have attracted much attention since it might be a threat for a current RSA-based P... [more] | ISEC2005-57 pp.101-107 |
| ISEC, IPSJ-CSEC, SITE | 2005-07-22 14:40 |
Iwate | Iwate Prefectural University | Improved Collision Attack on MD4 with Probability Almost 1 Yusuke Naito, Yu Sasaki, Noboru Kunihiro, Kazuo Ohta (UEC) |
In EUROCRYPT2005, a collision attack on MD4 was proposed by Wang et. al.. Wang et. al. claimed that collision messeage... [more] |
ISEC2005-58 pp.109-116 |
| ISEC | 2005-05-18 13:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Ring Signature Schemes with Innocence Assertion Revisited (Part 2)
-- Group Signatures Strengthening the Signers' Privacy -- Yuichi Komano (Toshiba), Kazuo Ohta (UEC), Atsushi Shimbo, Shinichi Kawamura (Toshiba) |
This paper reconsiders the ring signature scheme with innocence assertion [10] as a group signature scheme. The ring sig... [more] | ISEC2005-2 pp.9-16 |
| IT, WBS, ISEC | 2005-03-17 13:50 |
Kyoto | Kyoto Univ. | A consideration on Randomized Partial Checking Mix Yoshikazu Hanatani, Yasuhiko Hiehata, Bagus Santoso, Noboru Kunihiro, Kazuo Ohta (UEC) |
RPC-MIX[1] guarantees the correctness of shuffle by opening the relationship of each input/output exclusively between th... [more] | IT2004-52 ISEC2004-108 WBS2004-167 pp.13-18 |
| ISEC, IPSJ-CSEC | 2004-07-20 15:10 |
Tokushima | Tokushima Univ. | Optimal Security Proof for PFDH under Strong Existential Unforgeability Bagus Santoso, Kazuo Ohta, Noboru Kunihiro (UEC) |
[more] | ISEC2004-22 pp.53-60 |
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