Virendra Kumar

College of Computing
Georgia Institute of Technology
266 Ferst Drive, # 2124
Atlanta, GA 30332

virendra[AT]cc[DOT]gatech[DOT]edu

About me

I am a 2nd year PhD student at College of Computing, Georgia Tech. My research interests are in cryptography and information security. My advisor is Prof. Alexandra Boldyreva. I also work with Prof. Yael Tauman Kalai. I am a member of Theory at Georgia Tech. Before coming to Georgia Tech I finished my undergraduate studies in electrical engineering from IT-BHU in 2006. Here is my cv.

Publications

Efficient Revocation in Identity Based Encryption. With Alexandra Boldyreva and Vipul Goyal. (working paper)

Provable-Security Analysis of Authenticated Encryption in Kerberos. With Alexandra Boldyreva.

In Proc. 2007 IEEE Symposium on Security and Privacy (Oakland 2007), pp. 92-97.

We analyze the encryption schemes used in Kerberos. Although, most of the options suggested in the current version are sound for which we provide security proofs under standard assumptions, we point out flaws in the so called “General Profile” and suggest easy to implement modifications to provably fix them. For a widely deployed protocol like Kerberos, such provable security guarantees can go a long way in the standardization process.

A New Protocol to Counter Online Dictionary Attacks. With Vipul Goyal, Mayank Singh, Ajith Abraham and Sugata Sanyal.

In Computers & Security, vol. 25, no. 2, pp. 114-120, 2006.
In this paper, we propose an authentication protocol which is easy to implement without any infrastructural changes and yet prevents online dictionary attacks. Our protocol uses only one way hash functions and eliminates online dictionary attacks by implementing a challenge-response system. The protocol is perfectly stateless and thus less vulnerable to denial of service (DoS) attacks.

CompChall: Addressing Password Guessing Attacks. With Vipul Goyal, Mayank Singh, Ajith Abraham and Sugata Sanyal.

In Proc. International Conference on Information Technology: Coding and Computing (ITCC 2005), pp. 739-744.
This is the conference version of the paper "A New Protocol to Counter Online Dictionary Attacks".

Relevant Coursework

CS 6260 - Applied Cryptography: Taught by Prof. Alexandra Boldyreva, Fall 2006.
CS 6505 - Computability, Algorithms and Complexity: Taught by Prof. Yan Zong Ding, Spring 2007.
CS 6238 - Secure Computer Systems: Taught by Prof. Mustaque Ahamad, Spring 2007.
CS 6262 - Network Security: Taught by Prof. Jonathon T. Giffin, Fall 2007.
CS 8803FC - Foundations of Cryptography: Taught by Prof. Yael Tauman Kalai, Spring 2008.