Faculty Profiles - NOGAMI Yasuyuki

Papers - NOGAMI Yasuyuki

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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

Language：English Publisher：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

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

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

Publishing type：Research paper (international conference proceedings)

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

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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

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

Publishing type：Research paper (international conference proceedings)

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

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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

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) 2022.7

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) 2022.7

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) 2022.7

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) 2022.7

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 2022.6

Publishing type：Research paper (scientific journal) Publisher：MDPI AG

Ensuring the reliability of data gathering from every connected device is an essential issue for promoting the advancement of the next paradigm shift, i.e., Industry 4.0. Blockchain technology is becoming recognized as an advanced tool. However, data collaboration using blockchain has not progressed sufficiently among companies in the industrial supply chain (SC) that handle sensitive data, such as those related to product quality, etc. There are two reasons why data utilization is not sufficiently advanced in the industrial SC. The first is that manufacturing information is top secret. Blockchain mechanisms, such as Bitcoin, which uses PKI, require plaintext to be shared between companies to verify the identity of the company that sent the data. Another is that the merits of data collaboration between companies have not been materialized. To solve these problems, this paper proposes a business-to-business collaboration system using homomorphic encryption and blockchain techniques. Using the proposed system, each company can exchange encrypted confidential information and utilize the data for its own business. In a trial, an equipment manufacturer was able to identify the quality change caused by a decrease in equipment performance as a cryptographic value from blockchain and to identify the change one month earlier without knowing the quality value.

DOI： 10.3390/s22134909

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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

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

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

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

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

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 2021.6

Publishing type：Research paper (international conference proceedings)

We propose a CMAC using Lightweight Blockcipher Piccolo for a well-known LPWA: Sigfox network. Increasing numbers of a device link to the Internet with LPWA, However these devices does not have adequate resources. Our proposal would be an effective security measure for limited resource IoT devices with Sigfox network. Piccolo-CMAC is implemented by employing Piccolo-80 to encrypt message without using extra resources.

DOI： 10.1109/ITC-CSCC52171.2021.9501429

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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) 2021.6

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

Publishing type：Research paper (international conference proceedings)

In this research, the authors propose a functionality based on message authentication code (MAC) to ensure the correctness of its path from a source to a destination. It aims to use a controller area network (CAN) over driving system. In the construction, MAC and a pseudorandom number generator having an intentional group structure are employed so that the correct user can authenticate a message and its path. The proposed method is experimentally evaluated by observing the computational time over IoT devices. As a result, it is found that the results show that it is possible to implement as an additional function that gives path authentication with additional time at most 3 times for the corresponding computation.

DOI： 10.1007/978-3-030-72725-3_3

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Papers - NOGAMI Yasuyuki