Socio-technical defense against voice spamming
ACM Transactions on Autonomous and Adaptive Systems (TAAS)
Detecting spam in VoIP networks
SRUTI'05 Proceedings of the Steps to Reducing Unwanted Traffic on the Internet on Steps to Reducing Unwanted Traffic on the Internet Workshop
Fast Worm Containment Using Feedback Control
IEEE Transactions on Dependable and Secure Computing
A virtual environment for network testing
Journal of Network and Computer Applications
Sensitivity analysis of an attack containment model
ISI'05 Proceedings of the 2005 IEEE international conference on Intelligence and Security Informatics
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In a computer network, network security isaccomplished using elements like firewalls, hosts,servers, routers, intrusion detection systems, andhoney pots. These network elements need to know thenature or anomaly of the worm in priori to detect theattack. Modern day viruses like Code red, Sapphireand Nimda spread very fast. For example, Sapphirecan double its size and infect more than 90% of thevulnerable hosts within 10 minutes. Therefore it isimpractical if not impossible for human mediatedresponses to these modern day fast spreading viruses.Several epidemic studies show that automatictracking of resource usage and control is an effectivemethod in containing the damage. In this paper wepropose a state space feedback control model todetect and control the spread of these viruses bymeasuring the number of connections an infectedhost makes.The objective of the mechanism is to slowdown the spreading velocity of a worm by controlling(delaying) the total number of connections made byan infected host. As expected, the model showed thatthe sooner the infection is detected the faster thereduction of the spreading velocity. Additionally, thedeployment of a controller at different levels (hostand firewall) has shown to be very promising.