"I
believe in
intuition and inspiration. Imagination is more important than
knowledge. For knowledge is limited, whereas imagination embraces the
entire world, stimulating progress, giving birth to evolution. It is,
strictly speaking, a real factor in scientific research." ~Albert Einstein
My current research activities and interests can be found in my new homepage.
I am interested in different aspects of Computer
Science and Engineering.
Primarily, I am interested in
Algorithm Design and Analysis, Efficient and Parallel implementation,
Cryptology and Network Security, Symbolic Computing.
A brief discussion of some of my past research projects can be found here:
Algebraic Attacks On Block
Ciphers: Block ciphers are an important building block of modern cryptography. In August 2000, the block
cipher Rijndael was selected as Advanced Encryption Standard (AES). Rijndael is
a key-iterated block cipher with a very strong algebraic structure. AES
can be represented as algebraically closed equations over GF(28)
or
as a
system of multivariate equations over GF(2) with plain-text, cipher-text and key
bits as variables. The system of equations then can be solved for the key values
given a few known plain-text/cipher-text pairs for a specific key. We have
proposed a new heuristic to reduce the number of linearized equations for the XL
(eXtended Linearization) method. We have tried our algorithm on small random sparse
systems, and observed significant improvement in the performance of the
XL algorithm.
Project Supervisor: Dr.
Abhijit Das
Simulation Of Wireless AD
HOC Network Using Network Simulator (NS-2): Work involved
designing of an efficient routing algorithm for Mobile Ad hoc Network
(MANET) and simulation of the algorithm using NS-2. MANET is a
collection of wireless mobile hosts forming a temporary network without
the aid of any established infrastructure or centralized
administration. Location Aided Zone Routing Protocol (LAZRP) adopts the
idea of using the location information of a node from Zone Routing Protocol (ZRP). We
used the idea of LAZRP to design a new routing protocol in MANET.
We implemented our protocol using Network Simulator (NS-2).
Project
Supervisor: Dr. Nabendu Chaki
