Expressive Dynamic Threshold Attribute-Based Anonymous Credentials With Succinct Showing

This paper describes EDT-ABC, a new system for threshold attribute-based anonymous credentials (a type of digital credential that lets multiple independent organizations issue permissions without revealing the user's identity). EDT-ABC improves on previous systems by being faster and more flexible, allowing thresholds (minimum numbers of approvals needed) to be adjusted for different services and supporting selective disclosure (where users can prove they have certain permissions without revealing all their information). The researchers demonstrate their system runs significantly faster than existing solutions, reducing credential issuing time by at least 67% and showing time by at least 29%.