Prevention of Mobile Botnet in VPN

Threats are everywhere on the internet, but most significant and crucial threat is Botnet that control and command by a Botmaster. Bot is simply a machine that act as a zombie and try to effect all other machine available in network and that all machine are comes under control of Botmaster. It can detect by using honeypots, spamming botnet, network based, behavior based techniques. There are techniques to detect botnet but there is no scheme for prevent the network from Bot. In this thesis, prevention of botnet can be done by cryptography. Although two basics algorithms MD5 and Blowfish are used to detect and prevent the compromise node. Botnet cannot be delete from the network but possibility is that, neglect compromised node from the network. So, after detection, simply remove that node from the network then network became reliable to communicate.