A Research and Design of Byzantine Fault Tolerant DNS

This paper discusses DNS and its security extension and analyze its lack of security. A DNS system based on Byzantine fault tolerance is proposed .The DNS system is able to tolerate Byzantine fault tolerance using redundant servers and Byzantine intrusion tolerant technique and voting mechanism. With the method of distributing zone table into several DNS servers, using an improved Byzantine fault tolerant algorithm and majority voting mechanism, system can continuously provide services even if partial servers were intruded or faulty and the availability and security of DNS system are enhanced.