His research interests are in Cryptology and Discrete Mathematics. Dr. Gangopadhyay has taught Cryptography as an elective course at IIT Roorkee for several years to BTech students. He has guided six PhDs in the area of Cryptographic Boolean functions. Dr. Gangopadhyay has published research paper in leading journals such as IEEE Transaction of Information Theory, Discrete Mathematics, Discrete Applied Mathematics, Information Processing Letters etc. He has also been principal investigator of two international projects on Cryptology.