Study on network safety strategy against DDoS attack

Distributed denial of service attack (DDoS) Internet network caused a great threat. Now it has been proposed that a variety of defense mechanisms can not effectively solve the problem of that DDoS attack packets to the change of characteristics of random. This paper analyzes the principle of DDoS attacks, and proposes a concept built using SOA DDoS defense framework, and based on the use of encryption framework was constructed to protect the security certificate system in order to prevent DDoS attacks. Experiments show that the framework has a strong versatility and a strong defense of DDoS attacks, and it achieves in the attack source end blocking traffic intrusion..