Decoupled and Privacy-Preserving Key Generation in ABE Under the Minimal Disclosure Principle

This research proposes a new privacy-preserving method for key generation in ABE (attribute-based encryption, a system that lets users control access to data based on their personal attributes). The method follows a principle called Minimal Disclosure, where users only reveal the specific attributes they need to prove, rather than exposing all their attributes. The protocol separates attribute verification from key generation into two steps, uses batch verification to improve performance, and introduces metrics to measure how well it resists attacks that try to infer hidden user attributes.