研究者詳細 - 野上　保之

論文 - 野上　保之

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Improvement of Miller Loop for a Pairing on FK12 Curve and Evaluation with other STNFS Curves

Ikesaka Kazuma, Nanjo Yuki, Kodera Yuta, Kusaka Takuya, Nogami Yasuyuki

International Journal of Networking and Computing 13 ( 2 ) 242 - 257 2023年

記述言語：英語出版者・発行元：IJNC Editorial Committee

Pairing is carried out by two steps, Miller loop and final exponentiation. In this manuscript, the authors propose an efficient Miller loop for a pairing on the FK12 curve. A Hamming weight and bit-length of loop parameter have a great effect on the computational cost of the Miller loop. Optimal-ate pairing is used as the most efficient pairing on the FK12 curve currently. The loop parameter of optimal-ate pairing is 6z + 2 where z is the integer to make the FK12 curve parameter. Our method uses z which has a shorter bit-length than the previous optimal-ate pairing as the loop parameter. Usually, z has a low Hamming weight to make final exponentiation efficient. Therefore, the loop parameter in our method has a lower Hamming weight than the loop parameter of the previous one in many cases. The authors evaluate our method by the number of multiplications and execution time. As a result, the proposed algorithm leads to a 3.71% reduction in the number of multiplications and a 3.03% reduction in the execution time. In addition, the authors implement other STNFS secure curves and evaluate these curves from viewpoint of execution time.

DOI： 10.15803/ijnc.13.2_242

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A Consideration of Averaging the Calculation Cost of CVMA for A Secure Session based Data Transmission.

Akane Miyoshi, Kazuma Ikesaka, Ali Md. Arshad, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

ICCE-Taiwan 493 - 494 2023年

Improvement of Miller Loop for a Pairing on FK12 Curve and Evaluation with other STNFS Curves.

Kazuma Ikesaka, Yuki Nanjo, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

International Journal of Networking and Computing 13 ( 2 ) 242 - 257 2023年

A Smart Contract Based Blockchain Approach Integrated with Elliptic Curve Cryptography for Secure Email Application

Md Biplob Hossain, Maya Rahayu, Md Arshad Ali, Samsul Huda, Yuta Kodera, Yasuyuki Nogami

Proceedings - 2023 11th International Symposium on Computing and Networking Workshops, CANDARW 2023 195 - 201 2023年

掲載種別：研究論文（国際会議プロシーディングス）

In today's interconnected digital era, email stands as a primary platform for communication across various fields, such as business, academia, and personal interactions. Since it operates on shared mediums, email is inherently susceptible to interception and misuse of sensitive information. To cover this issue, Pretty Good Privacy (PGP) ensures the confidentiality of email contents. However, while PGP effectively encrypts the body of messages, a significant vulnerability emerges during key sharing. Blockchain technology comes with its immutability aspect. Once data is embedded into the blockchain, modifying it becomes exceedingly challenging. This makes it a potential safeguard against the vulnerabilities in PGP's key sharing mechanism. Additionally, smart contracts remove the requirement of a Man-in-the-Middle for sharing key, which enhances the sharing key's security and builds trust among users. In this paper, we integrate the strengths of blockchain into the PGP encryption process, specifically targeting the key sharing vulnerability. Also, we adopt Elliptic Curve Cryptography (ECC) to ensure the confidentiality of the PGP's key. First, generate the PGP's key. Then, encrypt it using ECC. After that, deploy a smart contract and continue with the encrypted PGP's key transactions in blockchain networks. Through this integration, we aim to enhance the security, ensuring both confidentiality and integrity of the PGP's key. We demonstrated that the proposed system is workable by experimental observation.

DOI： 10.1109/CANDARW60564.2023.00040

Scopus

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An integrated secured vehicular ad-hoc network leveraging Kerberos authentication and Blockchain technology.

Maya Rahayu, Md. Biplob Hossain, Ali Md. Arshad, Samsul Huda, Yuta Kodera, Yasuyuki Nogami

CANDARW 260 - 266 2023年

An integrated secured vehicular ad-hoc network leveraging Kerberos authentication and Blockchain technology

Maya Rahayu, Md Biplob Hossain, Md Arshad Ali, Samsul Huda, Yuta Kodera, Yasuyuki Nogami

Proceedings - 2023 11th International Symposium on Computing and Networking Workshops, CANDARW 2023 260 - 266 2023年

掲載種別：研究論文（国際会議プロシーディングス）

Vehicular Ad-Hoc Networks (VANETs) are a prominent technology in the drive towards establishing smart transportation systems in the Digital Transformation (DX) era. These networks provide users with critical road information for optimal route selection and accident avoidance. However, the openness of VANETs environment makes them susceptible to various cyber threats. Therefore, authenticating the entities that join the network is necessary and crucial for ensuring the security and integrity of VANET communications. Kerberos is one of the authentication protocols that ensure security, as the password and key are never directly sent among the entities. However, ensuring secure and efficient authentication, especially in VANET handovers, remains a challenge. This paper introduces an innovative authentication system for VANETs that leverages the combined power of blockchain and Kerberos. The system stores Kerberos authenticator messages in a distributed ledger within the blockchain, accessible to Trusted Authorities (TAS) and all RSUs. This approach streamlines vehicle handovers and safeguards authenticator messages against adversarial tampering. It exhibits minimal signalling overhead and authentication delay, ensuring swift and secure authentication processes. We verify the proposal's effectiveness by simulating the VANETs environment with 100 vehicles, 4 RSUs, and 1 TAS using Omnet++ with the Tsushima, Japan area map.

DOI： 10.1109/CANDARW60564.2023.00050

Scopus

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A Smart Contract Based Blockchain Approach Integrated with Elliptic Curve Cryptography for Secure Email Application.

Md. Biplob Hossain, Maya Rahayu, Ali Md. Arshad, Samsul Huda, Yuta Kodera, Yasuyuki Nogami

CANDARW 195 - 201 2023年

Design and implementation of a practical control system for an air-conditioner with IoT sensor nodes

Mengfang Duan, Yuta Kodera, Nobuya Ishihara, Yasuyuki Nogami, Takuya Kusaka

2022 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2022年7月

Improvement of Final Exponentiation for a Pairing on FK12 Curve and its Implementation

Kazuma Ikesaka, Yuki Nanjo, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

2022 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2022年7月

Comparison of conversion matrices for a compact AES–CTR defined over an isomorphic field

Tomoya Hikida, Yasuyuki Nogami, Md. Arshad Ali, Yuta Kodera

2022 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2022年7月

A Consideration on Change the Transition Probability of SHAKE256 with Different Initial Values

Tetsuro Ishida, Ryoichi Sato, Md. Arshad Ali, Takuya Kusaka, Yasuyuki Nogami, Yuta Kodera

2022 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2022年7月

A Business-to-Business Collaboration System That Promotes Data Utilization While Encrypting Information on the Blockchain

Hiroaki Nasu, Yuta Kodera, Yasuyuki Nogami

Sensors 22 ( 13 ) 4909 - 4909 2022年6月

Transition Probability Test for an RO-Based Generator and the Relevance between the Randomness and the Number of ROs.

Yuta Kodera, Ryoichi Sato, Ali Md. Arshad, Takuya Kusaka, Yasuyuki Nogami

Entropy 24 ( 6 ) 780 - 780 2022年

Efficient Final Exponentiation for Cyclotomic Families of Pairing-Friendly Elliptic Curves with Any Prime Embedding Degrees.

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

Int. J. Netw. Comput. 12 ( 2 ) 317 - 338 2022年

A Study on Parameters of Piecewise Logistic Map over Large Integers and Processing Time.

Ryo Inoue, Takeru Miyazaki, Satoshi Uehara, Shunsuke Araki, Yasuyuki Nogami

ICCE-TW 169 - 170 2022年

Improvement of Optimal-Ate Pairing on Cocks-Pinch Curve with Embedding Degree 6 in Affine Coordinates.

Tomohiro Iida, Kazuma Ikesaka, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

2022 Tenth International Symposium on Computing and Networking(CANDARW) 309 - 315 2022年

Improvement of Miller Loop for a Pairing on FK12 Curve and its Implementation.

Kazuma Ikesaka, Yuki Nanjo, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

Tenth International Symposium on Computing and Networking(CANDAR) 104 - 109 2022年

Proposal of Piccolo-CMAC for Sigfox network

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

2021 36th International Technical Conference on Circuits/Systems, Computers and Communications, ITC-CSCC 2021 2021年6月

Efficient Implementation of ECDH for Sigfox Communication

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

2021 36th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2021年6月

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

Yuki Taketa, Yuta Kodera, Takuya Kusaka, Yasuyuki Nogami

Communications in Computer and Information Science 1383 CCIS 38 - 48 2021年

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