PAAS: A Policy-Adaptive Anonymity Scheme for Cross-Domain Virtual Asset Service Providers

PAAS is a system designed to help virtual asset service providers (VASPs, companies that handle cryptocurrencies or digital assets) follow financial regulations that require sharing customer information while still protecting user privacy across multiple companies. The system uses cryptographic techniques to prevent linking a user's anonymous account to their real identity, allow authorities to trace transactions when needed based on specific policies, and safely handle situations where users move assets between different providers.