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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 32  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
ICSS, IPSJ-SPT 2024-03-21
10:55
Okinawa OIST
(Primary: On-site, Secondary: Online)
A comprehensive investigation of forgery attack on the Nostr protocol
Hayato Kimura (Univ. Hyogo), Ryoma Ito (NICT), Kazuhiko Minematsu (NEC), Takanori Isobe (Univ. Hyogo) ICSS2023-69
(To be available after the conference date) [more] ICSS2023-69
pp.1-8
ICSS, IPSJ-SPT 2024-03-21
11:45
Okinawa OIST
(Primary: On-site, Secondary: Online)
Security Analysis on End-to-End Encryption of Zoom Mail
Shogo Shiraki, Takanori Isobe (Univ.Hyogo) ICSS2023-71
Zoom Mail, an email service offered by Zoom Video Communications, incorporates an end-to-end encryption (E2EE) scheme, t... [more] ICSS2023-71
pp.17-24
EMM, BioX, ISEC, SITE, ICSS, HWS, IPSJ-CSEC, IPSJ-SPT [detail] 2023-07-25
09:20
Hokkaido Hokkaido Jichiro Kaikan SAT-based Differential analysis of AEGIS Family
Takuro Shiraya (UOH), Kosei Sakamoto (Mitsubishi Electric), Takanori Isobe (UOH) ISEC2023-45 SITE2023-39 BioX2023-48 HWS2023-45 ICSS2023-42 EMM2023-45
We evaluate the security of the AEGIS family which is authenticated encryption with an associated data scheme to achieve... [more] ISEC2023-45 SITE2023-39 BioX2023-48 HWS2023-45 ICSS2023-42 EMM2023-45
pp.202-207
EMM, BioX, ISEC, SITE, ICSS, HWS, IPSJ-CSEC, IPSJ-SPT [detail] 2023-07-25
09:40
Hokkaido Hokkaido Jichiro Kaikan SAT-based Search of Related-key Impossible Distinguisher for Piccolo, TWINE, LBlock
Shion Utsumi (Univ. of Hyogo), Kosei Sakamoto (MELCO), Takanori Isobe (Univ. of Hyogo) ISEC2023-46 SITE2023-40 BioX2023-49 HWS2023-46 ICSS2023-43 EMM2023-46
In this paper, we evaluate security of Piccolo, TWINE, T-TWINE and LBlcok angainst on impossilbe related-key differentia... [more] ISEC2023-46 SITE2023-40 BioX2023-49 HWS2023-46 ICSS2023-43 EMM2023-46
pp.208-213
EMM, BioX, ISEC, SITE, ICSS, HWS, IPSJ-CSEC, IPSJ-SPT [detail] 2023-07-25
10:20
Hokkaido Hokkaido Jichiro Kaikan On the Maximum Differential Characteristic Probabilities for Multi-Branch Structures
Kazuma Taka (Hyogo Univ.), Kosei Sakamoto (Mitsubishi Electric), Takanori Isobe (Hyogo Univ.) ISEC2023-48 SITE2023-42 BioX2023-51 HWS2023-48 ICSS2023-45 EMM2023-48
The design of multiple-branch-based designs, such as the low-latency pseudo-random function Orthros, holds the potential... [more] ISEC2023-48 SITE2023-42 BioX2023-51 HWS2023-48 ICSS2023-45 EMM2023-48
pp.221-228
EMM, BioX, ISEC, SITE, ICSS, HWS, IPSJ-CSEC, IPSJ-SPT [detail] 2023-07-25
14:30
Hokkaido Hokkaido Jichiro Kaikan Security Analysis on Nostr protocol for decentralized SNS
Hayato Kimura, Takanori Isobe (Univ. Hyogo) ISEC2023-51 SITE2023-45 BioX2023-54 HWS2023-51 ICSS2023-48 EMM2023-51
Nostr is a protocol for distributed social networking services (SNS) characterized by being Simple, Resilient, and Verif... [more] ISEC2023-51 SITE2023-45 BioX2023-54 HWS2023-51 ICSS2023-48 EMM2023-51
pp.239-246
ISEC 2023-05-17
15:55
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] An Efficient Strategy to Construct a Better Differential on Multiple-Branch-Based Designs: Application to Orthros (from CT-RSA 2023)
Kazuma Taka, Kosei Sakamoto (Hyogo Univ.), Tatsuya Ishikawa (WDB KOUGAKU Co.,Ltd.), Takanori Isobe (Hyogo Univ.) ISEC2023-12
As low-latency designs tend to have a small number of rounds to decrease latency, the differential-type cryptanalysis ca... [more] ISEC2023-12
p.65
RCC, ISEC, IT, WBS 2023-03-15
15:20
Yamaguchi
(Primary: On-site, Secondary: Online)
Evaluation and Improvement of Related Key Differential Attack for the Block Cipher Midori
Shion Hirao, Keigo Horibe, Kosei Sakamoto, Takanori Isobe (UOH) IT2022-132 ISEC2022-111 WBS2022-129 RCC2022-129
 [more] IT2022-132 ISEC2022-111 WBS2022-129 RCC2022-129
pp.404-411
IT, ISEC, RCC, WBS 2022-03-11
11:35
Online Online Improved Large-state Permutation based on AES instruction and Its Applications
Motoki Nakahashi, Rentaro Shiba, Kosei Sakamoto, Fukang Liu (Univ. Hyogo), Ryoma Ito (NICT), Kazuhiko Minematsu (NEC), Takanori Isobe (Univ. Hyogo/NICT/PRESTO) IT2021-115 ISEC2021-80 WBS2021-83 RCC2021-90
In CSS2021, Nakahashi et al. showed an optimal Feistel-type large-state permutations using only AES-NI from the security... [more] IT2021-115 ISEC2021-80 WBS2021-83 RCC2021-90
pp.188-195
IT, ISEC, RCC, WBS 2022-03-11
14:05
Online Online Rocca: Efficient AES-based Encryption Scheme for Beyond 5G
Kosei Sakamoto, Fukang Liu (Univ of Hyogo), Yuto Nakano, Shinsaku Kiyomoto (KDDI Research), Takanori Isobe (Univ of Hyogo/NICT) IT2021-126 ISEC2021-91 WBS2021-94 RCC2021-101
In this paper, we present an AES-based authenticated-encryption with associated-data scheme nemed Rocca, with the purpos... [more] IT2021-126 ISEC2021-91 WBS2021-94 RCC2021-101
pp.249-255
IT, ISEC, RCC, WBS 2022-03-11
14:30
Online Online Implementation and Performance Evaluation of Rocca
Yuto Nakano (KDDI Research), Kosei Sakamoto, Fukang Liu (Univ of Hyogo), Shinsaku Kiyomoto (KDDI Research), Takanori Isobe (Univ of Hyogo/NICT) IT2021-127 ISEC2021-92 WBS2021-95 RCC2021-102
In this paper, we implement an AES-based authenticated-encryption with associated-data scheme called name, proposed by S... [more] IT2021-127 ISEC2021-92 WBS2021-95 RCC2021-102
pp.256-261
ICSS, IPSJ-SPT 2021-03-02
14:55
Online Online Security Evaluation of End-to-End Encryption of LINE Version 2
Kotaro Kita, Takanori Isobe (UH) ICSS2020-47
 [more] ICSS2020-47
pp.126-131
ISEC 2020-05-20
13:50
Online Online [Invited Talk] Tweakable TWINE: Building a Tweakable Block Cipher on Generalized Feistel Structure (from IWSEC 2019)
Kosei Sakamoto (University of Hyogo), Kazuhiko Minematsu (NEC), Nao Shibata, Maki Shigeri, Hiroyasu Kubo (NES), Yuki Funabiki (Kobe Univ.), Andrey Bogdanov (DTU), Sumio Morioka (Interstellar), Takanori Isobe (University of Hyogo/NICT) ISEC2020-7
 [more] ISEC2020-7
p.29
ISEC, IT, WBS 2020-03-11
09:30
Hyogo University of Hyogo
(Cancelled but technical report was issued)
Security Evaluation of Differential Attacks against KCipher-2
Jin Hoki, Kosei Sakamoto (Hyogo Univ.), Kazuhiko Minematsu (NEC), Takanori Isobe (Hyogo Univ./NICT) IT2019-108 ISEC2019-104 WBS2019-57
This paper will investigate the resistance of KCipger-2 against differential attacks, which is the unique official strea... [more] IT2019-108 ISEC2019-104 WBS2019-57
pp.121-126
SITE, ISEC, LOIS 2018-11-03
11:00
Fukuoka   A Statistical Method for Searching Biases of Stream Ciphers
Seiya Tanamoto, Toshihiro Ohigashi (Tokai Univ), Takanori Isobe (Univ. of Hyogo) ISEC2018-64 SITE2018-42 LOIS2018-24
Plaintext recovery attacks on stream ciphers based on biases of keystream in the broadcast setting where same plaintext ... [more] ISEC2018-64 SITE2018-42 LOIS2018-24
pp.1-6
SITE, ISEC, LOIS 2018-11-03
11:30
Fukuoka   A Study on a New Evaluation Tool for Pseudo Random Number Generators based on Neural Network
Hayato Kimura (Tokai Univ.), Takanori Isobe (Univ. of Hyogo), Toshihiro Ohigashi (Tokai Univ.) ISEC2018-65 SITE2018-43 LOIS2018-25
Security of stream cipher depends on PRNG (Pseudo Random Number Generator) of the stream cipher. There are evaluation me... [more] ISEC2018-65 SITE2018-43 LOIS2018-25
pp.7-12
ISEC 2018-09-07
16:00
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] Improved Division Property Based Cube Attacks Exploiting Algebraic Properties of Superpoly (from CRYPTO2018)
Yosuke Todo (NTT), Takanori Isobe (Univ. of Hyogo) ISEC2018-61
 [more] ISEC2018-61
p.57
ISEC 2018-09-07
16:30
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] Fast Correlation Attack Revisited --Cryptanalysis on Full Grain-128a, Grain-128, and Grain-v1 (from CRYPTO2018)
Yosuke Todo (NTT), Takanori Isobe (Univ. of Hyogo), Kazumaro Aoki (NTT) ISEC2018-62
 [more] ISEC2018-62
p.59
ISEC 2018-05-16
16:30
Tokyo Ookayama Campus, Tokyo Institute of Technology [Invited Talk] New Key Recovery Attacks on Minimal Two-Round Even-Mansour Ciphers
Takanori Isobe (Univ. of Hyogo), Kyoji Shibutani (Nagoya Univ.) ISEC2018-11
In this invited talk, we introduce our paper presented in international cryptographic conference ASIACRYPT 2017 held on ... [more] ISEC2018-11
p.61
ISEC 2017-09-04
16:30
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] Cube Attacks on Non-Blackbox Polynomials based on Division Property (from CRYPTO 2017)
Yosuke Todo (NTT), Takanori Isobe (Univ. of Hyogo) ISEC2017-48
 [more] ISEC2017-48
p.45
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