2 citations · 4 across the 8 of their papers we have counts for
8 papers
Malleability-Resistant Encrypted Control System with Disturbance Compensation and Real-Time Attack Detection
Naoki Aizawa, Keita Emura, Kiminao Kogiso
This study proposes an encrypted PID control system with a disturbance observer (DOB) using a keyed-homomorphic encryption (KHE) scheme, aiming to achieve control performance while…
On the Consideration of Vanity Address Generation via Identity-Based Signatures
Shogo Murasaki, Kazumasa Omote, Keita Emura
An address is indicated as an identifier of the user on the blockchain, and is defined by a hash value of the ECDSA verification key. A vanity address is an address that embeds cus…
A Smart Contract-based Non-Transferable Signature Verification System using Nominative Signatures
Hinata Nishino, Kazumasa Omote, Keita Emura
Nominative signatures allow us to indicate who can verify a signature, and they can be employed to construct a non-transferable signature verification system that prevents the sign…
An Anonymous yet Accountable Contract Wallet System using Account Abstraction
Kota Chin, Keita Emura, Kazumasa Omote
Account abstraction allows a contract wallet to initiate transaction execution. Thus, account abstraction is useful for preserving the privacy of externally owned accounts (EOAs) b…
An End-To-End Encrypted Cache System with Time-Dependent Access Control
Keita Emura, Masato Yoshimi
Due to the increasing use of encrypted communication, such as Transport Layer Security (TLS), encrypted cache systems are a promising approach for providing communication efficienc…
A Sealed-bid Auction with Fund Binding: Preventing Maximum Bidding Price Leakage
Kota Chin, Keita Emura, Kazumasa Omote +1
In an open-bid auction, a bidder can know the budgets of other bidders. Thus, a sealed-bid auction that hides bidding prices is desirable. However, in previous sealed-bid auction p…
An Anonymous Trust-Marking Scheme on Blockchain Systems
Teppei Sato, Keita Emura, Tomoki Fujitani +1
During the Coincheck incident, which recorded the largest damages in cryptocurrency history in 2018, it was demonstrated that using Mosaic token can have a certain effect. Although…
Building Secure and Anonymous Communication Channel: Formal Model and its Prototype Implementation
Keita Emura, Akira Kanaoka, Satoshi Ohta +1
Various techniques need to be combined to realize anonymously authenticated communication. Cryptographic tools enable anonymous user authentication while anonymous communication pr…