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Statistical inference of causal effects based on nonparametric instrumental variable method and its application
Get PDF横浜国立大学博士（理学
Chosen Ciphertext Security for Blind Identity-Based Encryption with Certified Identities
Get PDFIdentity-based encryption (IBE) is one of the important extension of public-key encryption (PKE) which can use identities, such as email addresses or phone numbers, as public keys. Due to this aspect, IBE can reduce the cost of maintaining public key infrastructure. However, it has a special issue called the “key escrow problem”, which means that the key generation center (KGC) can decrypt all ciphertexts and get all messages in them since it inherently has all user public/private key pairs. To tackle this problem, Emura, Katsumata, and Watanabe recently proposed a variant of IBE called blind IBE with certified identities by introducing identity certifying authority (ICA). Their constructions are based on pairing or lattice and secure against chosen plaintext attacks.
In this paper, we introduce security against chosen ciphertext attacks (CCA security) for blind identity-based Encryption with certified identities. More precisely, we formalize definitions of 3-types security against chosen ciphertext attacks (security against corrupted users, KGC, and ICA) for blind IBE with certified identities. Then, we propose the first blind IBE with certified identities schemes. Roughly, we provide a generic construction by applying the Fujisaki-Okamoto transformation to previous CPA secure Blind IBE with certified identities schemes. Through our generic construction, we obtain two instantiations based on pairing or lattice. Finally, we implement our pairing based scheme and demonstrate that it is practically efficient compared with existing schemes.Information Security Practice and Experience
18th International Conference, ISPEC 2023, Copenhagen, Denmark, August 24–25, 202
Performance Metric for Base Station Situational Awareness in Robotic Swarm Patrolling
Get PDFThis paper proposes a quantitative performance metric for patrolling missions by robotic swarms. Real-world robotics applications require predictability from human operators at a base station to prevent unexpected robotic behaviors and resultant harmful outputs. However, functions to ensure predictability, such as frequent communication to the base station, may reduce mission performance. The proposed performance metric quantifies the degree of situational awareness at the base station, which is strongly related to predictability. The metric visualizes the advantage of the functions for predictability enhancement and enables trade-off studies between mission performance and predictability from humans. Simulated patrolling missions with two different patrol algorithms exemplified the usage of the proposed metric.発表学会：ROBOMECH202
Effects of melanopsin stimulation on glare and color perception depending on presentation conditions
Get PDF横浜国立大学博士（工学）この学位論文の全文は、中央図書館で平日17時までに申請することで閲覧が可能です
