Threshold public key-sharing technique in block chain
Sagar Dhanraj Pande, Gurpreet Singh, Djabeur Mohamed Seifeddine Zekrifa, Shilpa Prashant Kodgire, Sunil A. Patel, Viet-Thanh Le · 2023
A threshold key-sharing technology-based publicly verifiable key-sharing technology is presented to explore blockchain users’ private keys’ security. After receiving key fragments, participating nodes validate them. When splitting the key, the central splitting node does evil. In the critical recovery stage, the key fragments of the nodes participating in key splicing are publicly verified to prevent them from doing evil. In the critical distribution stage, add IDs to participating nodes to track malicious nodes and update node status in real-time, and a dynamic threshold mechanism is designed. To maintain private key fragment integrity, the owner of the key fragment and the controller node redistribute it to the new participating nodes once the vital fragment node goes offline. Experimental results reveal that this scheme&s;s private key recovery rate is 80% and has threshold properties, traceability, unforgeability, and recoverability.