Mitsugu Iwamoto

How to Detect Malicious Behaviors in a Card-Based Majority Voting Protocol with Three Inputs

2020 · International Symposium on Information Theory and its Applications

Card-based protocol is a multi-party computation using cards. The card-based protocol using operations called private operation has an advantage that the number of cards and the number of times of communication are smaller than the …

Attribute-Based Anonymous Credentials with Update Broadcast

2026 · IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

Attribute-based anonymous credentials (ABC) allow users to prove possession of attributes (e.g., ages and addresses) to verifiers using credentials issued by trusted issuers. When considering updating credentials on attributes, each user has different credentials, and …