- ISI-Wipro Workshop on Machine Learning Benchmarking and Applications, Wipro Limited, November 7, 2016, Kolkata, India.
- 32nd Annual International Conference on the Theory and Applications of Cryptographic Techniques (EUROCRYPT), May 26-30, 2013, Athens, Greece.
- 44th IFF Spring School on Quantum Information Processing, February 25-March 8, 2013, Forschungszentrum Julich, Germany.
- Indo-US Workshop on Public Key Cryptography, January 12-14, 2012, Indian Statistical Institute, Kolkata.
- Hash Workshop on SHA3 Finalists, December 9-10, 2011, Indian Statistical Institute, Kolkata.
- One-day seminar on Free and Open Source Software in Computer Science Education, December 22, 2009, Stadel, Kolkata, organized by Computer Chapter of IEEE Calcutta Section.
- 1st Microsoft Research India Theory Day, December 22, 2007, Microsoft Research Lab, Bangalore, India.
- Faculty Enablement Program (FEP), June 11-23, 2006, Infosys Technologies Limited, Chennai, India.
- UGC Refresher Course on Theoretical Aspects of Computer Science, January 11 to February 2, 2007, Dept. of Computer Science \& Engineering, Jadavpur University, Kolkata, India.
- 13th UGC Orientation Programme, November 6 to December 2, 2006, UGC Academic Staff College, Jadavpur University Salt Lake Campus, Kolkata, India.
- 6th National Workshop on Cryptology, September 8-10, 2006, Defense Institute of Advanced Technology (a Deemed University under DRDO), Pune, India.
- Winter School on Chaos, Nonlinear Dynamics and Complexity, December 19-23, 2005, West Bengal University of Technology, Salt Lake, Kolkata, India.
- Discrete Mathematics and Computer Science Day (DMCSD), September 28, 2002, Department of Computer Science, State University of New York (SUNY) at Albany, U.S.A.
- 1st Lightweight Languages (LL1) Workshop, November 17, 2001, Massachusetts Institute of Technology (MIT), U.S.A., organized by the MIT Artificial Intelligence Lab Dynamic Languages Group.