研究者詳細 - 小寺　雄太

論文 - 小寺　雄太

分割表示 106 件中 41 - 60 件目／全件表示 >>

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

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

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

A Method to Eliminate Fruitless Cycles for Pollard’s Rho Method by Splitting a Seed-point Table for a Random Walk 査読

Shota Kanzawa, Hiromasa Miura, Yasuyuki Nogami, Yuta Kodera, Takuya Kusaka

Tenth International Symposium on Computing and Networking 110 - 116 2022年11月

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

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

Tenth International Symposium on Computing and Networking Workshops 309 - 315 2022年11月

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

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

Tenth International Symposium on Computing and Networking 104 - 109 2022年11月

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

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

The 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 1 - 6 2022年7月

Effectiveness of a Method to Eliminate Fruitless Cycles for Pollard's Rho Method 査読

S. Kanzawa, H. Miura, Y. Kodera, Y. Nogami, T. Kusaka

The 37th International Technical Conference on Circuits/Systems, Computers and Communications 1 - 4 2022年7月

Comparison of Conversion Matrices for a Compact AES-CTR Defined over an Isomorphic Field 査読

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

The 37th International Technical Conference on Circuits/Systems, Computers and Communications 249 - 252 2022年7月

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

T. Ishida, R. Sato, Md. Arshad Ali, T. Kusaka, Y. Nogami, Y. Kodera

The 37th International Technical Conference on Circuits/Systems, Computers and Communications 219 - 222 2022年7月

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

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

The 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 205 - 208 2022年7月

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

Hiroaki Nasu, Yuta Kodera, Yasuyuki Nogami

Sensors 22 ( 13 ) 4909 - 4909 2022年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：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 査読

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

Entropy 24 ( 6 ) 1 - 13 2022年5月

担当区分：筆頭著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG

A ring oscillator is a well-known circuit used for generating random numbers, and interested readers can find many research results concerning the evaluation of the randomness with a packaged test suit. However, the authors think there is room for evaluating the unpredictability of a sequence from another viewpoint. In this paper, the authors focus on Wold’s RO-based generator and propose a statistical test to numerically evaluate the randomness of the RO-based generator. The test adopts the state transition probabilities in a Markov process and is designed to check the uniformity of the probabilities based on hypothesis testing. As a result, it is found that the RO-based generator yields a biased output from the viewpoint of the transition probability if the number of ROs is small. More precisely, the transitions 01→01 and 11→11 happen frequently when the number l of ROs is less than or equal to 10. In this sense, l>10 is recommended for use in any application, though a packaged test suit is passed. Thus, the authors believe that the proposed test contributes to evaluating the unpredictability of a sequence when used together with available statistical test suits, such as NIST SP800-22.

DOI： 10.3390/e24060780

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

H. Nasu, R. Miyamoto, Y. Kodera, Y. Nogami

World Academy of Science, Engineering and Technology, Open Science Index 183, International Journal of Information and Communication Engineering 16 ( 3 ) 77 - 81 2022年3月