Study and Implementation of a Proactive Security Signature System

Constructing secure application in distributed computing environment is an important research problem of security Through using technologies like middleware, secret sharing, and share refresh, a proactive security DSA signature system is proposed and implemented, which includes a framework and a set of algorithms In this system, time is divided into time periods By analyzing the system’s security, a conclusion is drawn that if there are at least 3t+1 servers in the system, the signature system is secure and available even when up to t servers are corrupted during any time period