Faculty Profiles - KODERA Yuuta

Papers - KODERA Yuuta

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Calculation Costs Estimations of Final Exponentiation for Pairing-Friendly Elliptic Curves Resistant to Special TNFS Reviewed

Yuki Nanjo, Masaaki Shirase, Yuta Kodera, Takuya Kusaka, Yusyuki Nogami

The 36th International Technical Conference on Circuits/Systems, Computers and Communications 229 - 232 2021.6

Proposal of Piccolo-CMAC for Sigfox network Reviewed

Wataru Takehisa, Ryo Fukushima, Ryoichi Sato, Daichi Hattori, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

The 36th International Technical Conference on Circuits/Systems, Computers and Communications 120 - 123 2021.6

A Discussion of Statistical Affect of Rotation and XOR on Non-linear Filters for Sequences Reviewed

Tugumi Takatani, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

The 36th International Technical Conference on Circuits/Systems, Computers and Communications 316 - 319 2021.6

A Construction Method of Final Exponentiation for a Specific Cyclotomic Family of Pairing-Friendly Elliptic Curves with Prime Embedding Degrees. Reviewed

Yuki Nanjo, Masaaki Shirase, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

Ninth International Symposium on Computing and Networking(CANDAR) 148 - 154 2021

Path Authentication Protocol: Based on a Lightweight MAC and a Nonlinear Filter Generator Reviewed

Yuki Taketa, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

Silicon Valley Cybersecurity Conference 2020 CCIS 1383 38 - 48 2020.12

Multiplication and squaring in cubic and quartic extensions for pairing based cryptography Reviewed

Yuta Kodera, Sylvain Duquesne, Yasuyuki Nogami

Finite Fields and their Applications 71 - 86 2020.10

A Parallel Blum-Micali Generator Based on the Gauss Periods Reviewed

Yuta Kodera, Tomoya Tatara, Takuya Kusaka, Yasuyuki Nogami, Satoshi Uehara

The International Symposium on Information Theory and Its Applications 2020 447 - 450 2020.10

Equivalent Keys of a Nonlinear Filter Generator Using a Power Residue Symbol Reviewed

Yuta Kodera, Yuki Taketa, Takuya Kusaka, Yasuyuki Nogami, Satoshi Uehara

Advances in Information and Computer Security LNCS 12231 23 - 36 2020.9

Electrical Falsification of CAN Data by Magnetic Coupling Reviewed

Hiroto Ogura, Ryunosuke Isshiki, Kengo Iokibe, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

The 35th International Technical Conference on Circuits/Systems, Computers and Communications 348 - 353 2020.7

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Controller Area Network (CAN) is widely employed as an in-vehicle network, and is required for extremely high reliability. CAN uses five mechanisms to detect errors caused by channel noises in CAN frames. However, an adversary can reportedly falsify a CAN frame by tampering with sample points in the frame. In this paper, the effectiveness of a new falsification method that does not require sample point tampering is proposed. In the method, transient electromagnetic pulses are injected into a CAN bus by magnetic coupling that enables falsification at the target CAN node without error detection. The proposed method was examined on a CAN bus which consists of two CAN nodes. As a result, the new falsification method was effective for CAN.

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Evaluating Side-Channel Resistance Using Low Order Rational Points Against Curve25519 and an Associated Quadratic Twist. Reviewed

Keiji Yoshimoto, Yoshinori Uetake, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

International Journal of Networking and Computing 10 ( 2 ) 144 - 158 2020.7

Algebraic Group Structure of the Random Number Generator: Theoretical Analysis of NTU Sequence(s) Reviewed

Yuta Kodera, Md. Arshad Ali, Takeru Miyazaki, Takuya Kusaka, Yasuyuki Nogami, Satoshi Uehara, Robert H. Morelos-Zaragoza

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences E102-A ( 12 ) 1659 - 1667 2019.12

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：Institute of Electronics, Information and Communications Engineers (IEICE)

<p>An algebraic group is an essential mathematical structure for current communication systems and information security technologies. Further, as a widely used technology underlying such systems, pseudorandom number generators have become an indispensable part of their construction. This paper focuses on a theoretical analysis for a series of pseudorandom sequences generated by a trace function and the Legendre symbol over an odd characteristic field. As a consequence, the authors give a theoretical proof that ensures a set of subsequences forms a group with a specific binary operation.</p>

DOI： 10.1587/transfun.e102.a.1659

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Evaluating a Side-Channel Resistance against Order 4 Rational Points in Arduino Cryptography Library Reviewed

Keiji Yoshimoto, Yoshinori Uetake, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

2019 Seventh International Symposium on Computing and Networking (CANDAR) 245 - 250 2019.11

Decomposing the Inverse of a Masked Vector in an Isomorphic Galois Field for Perfectly Masked S-Box Reviewed

Yuta Kodera, Yuki Taketa, Takuya Kusaka, Yasuyuki Nogami

The Seventh International Symposium on Computing and Networking 157 - 163 2019.11

A Side-Channel Attack Using Order 8 Rational Points against Curve25519 on an 8-Bit Microcontroller Reviewed

Yoshinori Uetake, Keiji Yoshimoto, Yuta Kodera, Leo Weissbart, Takuya Kusaka, Yasuyuki Nogami

The Seventh International Symposium on Computing and Networking 225 - 231 2019.11

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Among the increasing evolution of IoT devices, practical applications need reliable secure protocols to communicate with each other. A major issue for modern cryptosystems is an implementation of secure and trustworthy mechanisms to rely on. A side-channel attack against these cryptosystems may overturn the guarantee of security against conventional cyber-attacks. Elliptic curve cryptography is public-key cryptography based on elliptic curves, and one of the well-known curves is Curve25519 which is used for TLS protocols as a recommended curve. This curve is mainly implemented on limited resource devices such as microcontrollers. However, this curve poses a weakness for low-order points during a Diffie-Hellman key exchange is employed. This research demonstrates possible exploitation of a threat of order 8 rational points of Curve25519 and shows results of the side-channel attacks using order 8 rational points on an embedded system. The results indicate the order 8 rational points might be applied to key extraction as attacker sides.

DOI： 10.1109/candar.2019.00037

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An Analysis of Computational Complexity of Low Level Quantizers for Block Turbo Decoding for Product Codes of Binary Linear Code Reviewed

Shinichi Kageyama, Ken Ikuta, Yuki Nanjo, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

The Seventh International Symposium on Computing and Networking Workshops 425 - 429 2019.11

Mutual Relationship between the Neural Network Model and Linear Complexity for Pseudorandom Binary Number Sequence Reviewed

Yuki Taketa, Yuta Kodera, Shogo Tanida, Takuya Kusaka, Yasuyuki Nogami, Norikazu Takahashi, Satoshi Uehara

The Seventh International Symposium on Computing and Networking Workshops 394 - 400 2019.11

Language：English Publishing type：Research paper (international conference proceedings) Publisher：IEEE

Machine learning (ML) technology has been getting popular in many applications where ML purposes to analyze or classify data, or predicting the phenomenon follows from the previous conditions, for example. However, the spread of ML technologies allows an attacker to use them into the attack for the sake of sniffing secret information. Since the randomness has been used for an inseparable part of the cryptographic applications to ensure the security, the resistance of a random sequence against analysis based on the ML technologies have to be required. The authors anticipate having the mutual relationship between the classical properties of the randomness, linear complexity (LC) in particular, and the structure of a neural network (NN), which is a class of ML. In this research, the authors find that the strength of each connection between nodes in the NN is relevant to the linear recurrence relation of the target sequence by observing parameters after complete learning. In other words, the difficulty of predicting the next bits from a given sequence would be discussed based on the LC of a sequence in most cases. The experimental results are introduced to clarify the black box in this research.

DOI： 10.1109/candarw.2019.00074

Web of Science

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Advanced Searchable Encryption: An Adaptively Secure Keyword Search for Matrix-type Storages Reviewed

Yuta Kodera, Minoru Kuribayashi, Takuya Kusaka, Yasuyuki Nogami

International Journal of Networking and Computing 9 ( 2 ) 171 - 187 2019.9

A Construction of a Keyword Search to Allow Partial Matching with a Block Cipher Reviewed

Yuta Kodera, Minoru Kuribayashi, Takuya Kusaka, Yasuyuki Nogami

Information Security Applications LNCS 11402 241 - 252 2019.8

Multi-Value Sequence Generated over Sub Extension Field and Its Properties Reviewed

Md. Arshad Ali, Yuta Kodera, Takuya Kusaka, Satoshi Uehara, Yasuyuki Nogami, Robert H. Morelos-Zaragoza

Journal of Information Security 10 ( 03 ) 130 - 154 2019.7

Well Balanced Multi-value Sequence and its Properties Over Odd Characteristic Field Reviewed

Md. Arshad Ali, Yuta Kodera, Md. Fazle Rabbi, Takuya Kusaka, Yasuyuki Nogami, Satoshi Uehara, Robert H. Morelos-Zaragoza

Advances in Science, Technology and Engineering Systems Journal 4 ( 4 ) 188 - 196 2019.7

Language：English Publishing type：Research paper (scientific journal) Publisher：ASTES Journal

The authors propose a well balanced multi-value sequence (including a binary sequence). All the sequence coefficients (except the zero) appear almost the same in number, thus, the proposed sequence is so called the well balanced sequence. This paper experimentally describes some prominent features regarding a sequence, for instance, its period, autocorrelation, and cross-correlation. The value of the autocorrelation and cross-correlation can be explicitly given by the authors formulated theorems. In addition, to ensure the usability of the proposed multi-value sequence, the authors introduce its flexibility by making it a binary sequence. Furthermore, this paper also introduces a comparison in terms of the linear complexity and distribution of bit patterns properties with their previous works. According to the comparison results, the proposed sequence holds better properties compared to our previous sequence.

DOI： 10.25046/aj040423

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Papers - KODERA Yuuta