Sriram Chellappan

   

Dept. of Computer Science

Missouri University of Science and Technology

(Formerly University of Missouri - Rolla)

 

Address: 500 W. 15th St.
                 325 Computer Science Building
                 Missouri University of Science & Technology
                 Rolla, MO 65409

Office: # 306

Phone No.: 573-341-4637

Fax.: 573-341-4501

Email: chellaps[at]mst[dot]edu

Brief Bio:

Sriram Chellappan is an Asst. Professor in the Dept of Computer Science at The Missouri University of Science and Technology - Rolla. His broad research interests are in the areas of Network Security, Wireless Networks and Distributed Systems. Sriram received the Ph.D. Degree from The Ohio-State University and the Bachelors degree from the University of Madras.

 


Research Interests:

·         Mobility in Wireless Sensor Networks: Recently, provisioning sensors with mobility has received significant attention. In this realm, I have identified an important property of mobility in energy constrained wireless sensor networks, namely mobility limitations on sensors. Since mobility consumes energy, it is very likely that the overall movement distance of sensors has hard limitations. My research on this topic has focused on designing movement algorithms for limited mobility sensors in order to maximize quality of desired deployment in the network starting from any arbitrary deployment. I am also working on leveraging limited sensor mobility in order to enhance quality of secure key management in certain mission critical wireless sensor networks. [See our papers to appear in IEEE TMC and IEEE TPDS]

·         Security in Wireless Sensor Networks: Along with my colleagues, I have studied the methodology of network decoupling to enhance quality of pair-wise key set up in randomly deployed wireless sensor networks. In this methodology, the logical key sharing topology is decoupled from the physical connectivity topology, thereby enhancing the flexibility of pair-wise key set up among sensors. Secondly, I have identified and studied the problem of physical attacks in wireless sensor networks. Being small in size, sensors are highly vulnerable to such attacks that aim to physically destroy sensors and render them in-operable. My research contributions in this realm are modeling such types of attacks and defenses against them. [See our papers in IEEE IWQoS 06 and IEEE MASS 05]

·         Security in Overlay and Peer to Peer Systems: Along with my colleagues, I have studied the issue of attackers leveraging  connectivity in Secure Overlay Forwarding Systems and Peer to Peer Systems. The observation is that; while rich connectivity is beneficial for users to set up multiple paths, it can also be leveraged by attackers to break into overlay nodes to rapidly disclose other nodes, or launch attacks like active worms on such systems, thereby compromising them. The research thereby demonstrates that network resource allocation, topologies, protocols design etc. should not just consider benign users, but also the possibility of malicious attackers exploiting these design features. [See our papers in IEEE ICC 05 and IEEE ICDCS 04]

           

Representative Publications:

·         Wei Yu, Sriram Chellappan, Xun Wang and Dong Xuan, Peer-to-Peer System-based Active Worm Attacks: Modeling, Analysis and Defense, to appear in Journal of Computer communications (COMCOM), Elsevier.

·         Xiaole Bai, Wenjun Gu, Sriram Chellappan, Xun Wang, Bin Ma and Dong Xuan, PAS: Predicate-based Authentication Services Against Powerful Passive Adversaries, to appear in Annual Computer Security Applications Conference (ACSAC), Anaheim, Dec. 2008.

·         Vamsi Paruchuri, Arjan Durresi and Sriram Chellappan, TTL based Packet Marking for IP Traceback, to appear in IEEE Global Communications Conference (Globecom), New Orleans, Dec. 2008.

·         Sriram Chellappan, Vamsi Paruchuri, Dylan McDonald and Arjan Durresi, Localizing Sensor Networks in Un-Friendly Environments, to appear in IEEE Military Communications Conference (MILCOM), San Diego, Nov. 2008.

·         Vamsi Paruchuri, Arjan Durresi and Sriram Chellappan, Secure Communications over Hybrid Military Networks, to appear in IEEE Military Communications Conference (MILCOM), San Diego, Nov. 2008.

·         Sriram Chellappan, Wenjun Gu, Xiaole Bai, Dong Xuan, Bin Ma and Kaizhong Zhang, Deploying Wireless Sensor Networks under Limited Mobility Constraints, to appear in IEEE Transactions on Mobile Computing (TMC). [.pdf]

·         Sriram Chellappan, Xiaole Bai, Bin Ma, Dong Xuan and Changqing Xu, Mobility Limited Flip-based Sensor Network Deployment, to appear in IEEE Transactions on Parallel and Distributed Systems (TPDS). [.pdf]

·         Wenjun Gu, Xiaole Bai, Sriram Chellappan and Dong Xuan, Network Decoupling for Secure Communications in Wireless Sensor Networks, in Proc. of IEEE International Workshop on Quality of Service (IWQoS), June 2006. [.pdf | .ppt] (An extended version has been accepted for publication in IEEE Transactions on Parallel and Distributed Systems (TPDS). [.pdf])

·         Wenjun Gu, Xun Wang, Sriram Chellappan, Dong Xuan and Ten H. Lai, Defending against Search-based Physical Attacks in Sensor Networks, in Proc. of IEEE Mobile Sensor and Ad-hoc and Sensor Systems (MASS), Nov. 2005. [.pdf | .ppt]

·         Wei Yu, Philip Coyer Boyer, Sriram Chellappan and Dong Xuan, Peer-to-Peer System-based Active Worm Attacks: Modeling and Analysis, in Proc. of IEEE International Conference on Communications (ICC), May 2005. [.pdf]

·         Dong Xuan, Sriram Chellappan, Xun Wang and Shengquan Wang, Analyzing the Secure Overlay Services Architecture under Intelligent DDoS Attacks, in Proc. of IEEE International Conference on Distributed Computing Systems (ICDCS), March 2004. [.pdf | .ppt]

·         Click Here for a complete list of my publications.

 

 

 

 

Last Modified: Jan 8th 2008.