Comparison of DDOS Attacks and Fast ICA Algorithms on The Basis of Time Complexity

In Distributed denial of service (DDOS) attack, an attacker may use your computer to attack another computer by taking security weakness an attacker could take control of your computer. He could then force your computer to send huge amounts of data to a website. Or send spam particular email address. The “Attack” is distributed because the attacker is using multiple computers including yours to enter the denial of service attack. DDoS attack is a continuous critical threat to the Internet. Derived from the low layers, new applicationlayer-based DDoS attacks utilizing legitimate HTTP requests to overwhelm victim resources are more undetectable. The case may be more serious when such attacks mimic or occur during the flash crowd event of a popular Website. Distributed denial of service attacks on root name servers are several significant Internet events in which distributed denial-of-service attacks have targeted one or more of the thirteen Domain Name System root name servers. The root name servers are critical infrastructure components of the Internet, mapping domain names to Internet Protocol (IP) addresses and other information. Attacks against the root name servers can impact operation of the entire Internet, rather than