Trustworthy Federated Identity Management (TFIM) for secure DApp interoperability in cross-chain environment

Abstract

This chapter proposes a Trustworthy Federated Identity Management (TFIM) framework developed to overcome user identity management challenges across multiple blockchain networks. The research work focuses on solving key issues, such as the lack of unified trust frameworks, insufficient cross-chain identity verification, and limited privacy-preserving mechanisms for cross-chain data sharing. TFIM allows secure DApp interoperability by assessing participant trustworthiness across blockchain networks with the integration of zero-knowledge proofs and federated learning techniques. Performance evaluation shows that TFIM processes 44,041 transactions/s with 15% degradation under real-world conditions, supports 1000 concurrent users, and handles 100 cross-chain authentications/s across up to 15 interconnected networks. Although TFIM provides better privacy protection and more advanced cross-chain capabilities than the Blockchain-Based Federated Identity Framework (BFIF), it comes at the cost of computational overhead and registration/authorization speed. The results suggest potential directions for future optimization while maintaining TFIM’s robust cross-chain functionality and privacy features.