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 Results 1 - 15 of 15  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
EMM, BioX, ISEC, SITE, ICSS, HWS, IPSJ-CSEC, IPSJ-SPT [detail] 2022-07-20
16:40
Online Online Efficient Constructions of Adaptively and CCA-secure Identity-based Encryption with Equality Test from LWE Assumption in the Standard Model
Kyoichi Asano (UEC/NICT), Keita Emura (NICT), Atsushi Takayasu (Univ. Tokyo) ISEC2022-29 SITE2022-33 BioX2022-54 HWS2022-29 ICSS2022-37 EMM2022-37
Identity-based Encryption with Equality Test (IBEET) is an extension of identity-based Encryption (IBE) that can check t... [more] ISEC2022-29 SITE2022-33 BioX2022-54 HWS2022-29 ICSS2022-37 EMM2022-37
pp.131-138
ISEC 2022-05-18
14:30
Online Online Improved Orthogonal Lattice Attack for Solving Multi-prime Approximate Common Divisor Problem
Kento Urano, Atsushi Takayasu (Univ. Tokyo) ISEC2022-3
 [more] ISEC2022-3
pp.11-18
ISEC 2020-05-20
10:45
Online Online Improved Quantum Information Set Decoding Algorithm with Low Memory
Naoto Kimura (Univ. Tokyo), Atsushi Takayasu (NICT), Tsuyoshi Takagi (Univ. Tokyo) ISEC2020-3
The security of code-based cryptoststems relates to the hardness of the syndrome decoding problem. The best decoding alg... [more] ISEC2020-3
pp.15-22
ISEC, SITE, ICSS, EMM, HWS, BioX, IPSJ-CSEC, IPSJ-SPT [detail] 2019-07-23
13:10
Kochi Kochi University of Technology Constructing More Efficient Lattice-based Revocable IBE with Adaptive Security
Atsushi Takayasu (Univ. Tokyo) ISEC2019-21 SITE2019-15 BioX2019-13 HWS2019-16 ICSS2019-19 EMM2019-24
 [more] ISEC2019-21 SITE2019-15 BioX2019-13 HWS2019-16 ICSS2019-19 EMM2019-24
pp.99-106
HWS, ISEC, SITE, ICSS, EMM, IPSJ-CSEC, IPSJ-SPT [detail] 2018-07-25
10:20
Hokkaido Sapporo Convention Center Construction of Revocable HIBE with Adaptive Security
Atsushi Takayasu (Univ. Tokyo) ISEC2018-14 SITE2018-6 HWS2018-11 ICSS2018-17 EMM2018-13
Revocable hierarchical identity-based encryption (RHIBE) is an extension of IBE with a key revocation mechanism and a ke... [more] ISEC2018-14 SITE2018-6 HWS2018-11 ICSS2018-17 EMM2018-13
pp.9-16
HWS, ISEC, SITE, ICSS, EMM, IPSJ-CSEC, IPSJ-SPT [detail] 2018-07-25
15:50
Hokkaido Sapporo Convention Center Extended Partial Key Exposure Attacks on RSA
Kaichi Suzuki, Atsushi Takayasu, Noboru Kunihiro (Univ. of Tokyo) ISEC2018-29 SITE2018-21 HWS2018-26 ICSS2018-32 EMM2018-28
Thus far, emph{partial key exposure attacks} on RSA, i.e., attackers are given the most significant bits (MSBs) emph{or}... [more] ISEC2018-29 SITE2018-21 HWS2018-26 ICSS2018-32 EMM2018-28
pp.155-162
HWS, ISEC, SITE, ICSS, EMM, IPSJ-CSEC, IPSJ-SPT [detail] 2018-07-26
14:10
Hokkaido Sapporo Convention Center A New Embedding Method for Generalized LWE
Weiyao Wang, Yuntao Wang, Atsushi Takayasu, Tsuyoshi Takagi (Univ. Tokyo) ISEC2018-46 SITE2018-38 HWS2018-43 ICSS2018-49 EMM2018-45
Estimating the computational cost for solving learning with errors (LWE) problem is an indispensable research topic to u... [more] ISEC2018-46 SITE2018-38 HWS2018-43 ICSS2018-49 EMM2018-45
pp.363-370
LOIS, ISEC, SITE 2017-11-10
15:10
Kyoto   Lattice Attacks on Elliptic Curve Diffie-Hellman key exchange
Sota Onozawa (The Univ. of Tokyo), Atsushi Takayasu (The Univ. of Tokyo/AIST), Noboru Kunihiro (The Univ. of Tokyo) ISEC2017-69 SITE2017-51 LOIS2017-46
Boneh and Venkatesan (Crypto’96) introduced the hidden number problem (HNP) to study the security of Diffie-Hellman key... [more] ISEC2017-69 SITE2017-51 LOIS2017-46
pp.115-122
LOIS, ISEC, SITE 2017-11-10
16:10
Kyoto   Revocable Hierarchical Identity-Based Encryption based on LWE Assumption
Atsushi Takayasu, Shuichi Katsumata (Univ. Tokyo), Takahiro Matsuda (AIST) ISEC2017-71 SITE2017-53 LOIS2017-48
Revocable hierarchical identity-based encryption~(RHIBE) is an advanced form of standard identity-based encryption. RHIB... [more] ISEC2017-71 SITE2017-53 LOIS2017-48
pp.129-136
ISEC 2017-09-04
10:00
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] Small CRT-exponent RSA Revisited from Eurocrypt 2017
Atsushi Takayasu (Univ. Tokyo) ISEC2017-39
 [more] ISEC2017-39
pp.1-2
ISEC, WBS, IT 2017-03-09
14:00
Tokyo TOKAI University Security Analysis of Ordinary Isogeny Diffie--Hellman
Satoshi Furukawa, Atsushi Takayasu, Noboru Kunihiro (The Univ. of Tokyo) IT2016-104 ISEC2016-94 WBS2016-80
In this paper, we analyze the security of Ordinary Isogeny Diffie--Hellman (OIDH) key exchange proposed by Stolbunov (Ad... [more] IT2016-104 ISEC2016-94 WBS2016-80
pp.33-40
EMM, ISEC, SITE, ICSS, IPSJ-CSEC, IPSJ-SPT [detail] 2016-07-15
13:25
Yamaguchi   Worst Case Short Lattice Point Enumeration on Block Reduced Bases
Atsushi Takayasu, Noboru Kunihiro (Univ. Tokyo) ISEC2016-33 SITE2016-27 ICSS2016-33 EMM2016-41
(To be available after the conference date) [more] ISEC2016-33 SITE2016-27 ICSS2016-33 EMM2016-41
pp.177-184
ICSS, ISEC, SITE, EMM, IPSJ-CSEC, IPSJ-SPT [detail] 2014-07-03
14:15
Hokkaido San-Refure Hakodate Security of RSA with Many Decryption Exponents
Atsushi Takayasu, Noboru Kunihiro (Univ. of Tokyo) ISEC2014-19 SITE2014-14 ICSS2014-23 EMM2014-19
When we use small secret exponents, RSA becomes efficient for its decryption cost and signature generation cost. However... [more] ISEC2014-19 SITE2014-14 ICSS2014-23 EMM2014-19
pp.93-96
EMM, ISEC, SITE, ICSS, IPSJ-CSEC, IPSJ-SPT [detail] 2013-07-19
16:05
Hokkaido   Recovering RSA Secret Keys from Observed Analog Data (I)
Noboru Kunihiro, Atsushi Takayasu (Univ. of Tokyo) ISEC2013-46 SITE2013-41 ICSS2013-51 EMM2013-48
 [more] ISEC2013-46 SITE2013-41 ICSS2013-51 EMM2013-48
pp.339-343
EMM, ISEC, SITE, ICSS, IPSJ-CSEC, IPSJ-SPT [detail] 2012-07-20
14:20
Hokkaido   An Improved Algorithm for Approximate GCD Problems
Atsushi Takayasu, Noboru Kunihiro (UT) ISEC2012-35 SITE2012-31 ICSS2012-37 EMM2012-27
In this paper, we analyze multivariate approximate common divisor problem(ACDP), given approximate multiples of the inte... [more] ISEC2012-35 SITE2012-31 ICSS2012-37 EMM2012-27
pp.189-194
 Results 1 - 15 of 15  /   
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