Blockchain-Based Identity Solutions for Privacy Protection in Online Transactions
M. Sathyanarayanan, Usha Bala Varanasi, Inderpreet Kaur, Rajkumar Chadge, Khaled E. Al-Qawasmi, G R Abijith · 2025
Online growth leads organizations to demand protected systems that protect privacy while managing identities. Traditional identity systems maintain centralized control that exposes users to data breaches while requiring new security solutions. A blockchain-enabled identity management solution was designed to implement zero-knowledge proofs (ZKP) for authentication methods with distributed execution of user credentials. The system uses Ethereum alongside Hyperledger Fabric platforms and runs simulations through Hyperledger Caliper platforms. The results demonstrate significant improvements in key performance metrics: The system delivered verification accuracy at 98.7% privacy leakage reached 0.05% while transaction latency fell under 125 ms and TPS scalability reached 950. The proposed model delivered superior privacy guarantees and operating efficiency. Future advancements in decentralized identity management build upon a reliable platform that ensures both privacy preservation and secure identity solutions.