1. Delivered three invited lectures on "Distribution Theory and its Applications in The Real World Problem" in The National Level Short Term Training Programme on Mathematical Modelling in Science and Engineering organized by the Department of Mathematics, NIT Raipur during July 02-06, 2014.
2. Delivered a talk on "Secure Image Transmission" in the Approximation Theory Seminar at the Mathematics Department, University of Central Florida, Orlando, USA, on July 15, 2015.
3. Delivered a guest lecture on "Vector Calculus and its Application in Engineering" organized by the Department of Mathematics, School of Advanced Sciences, VIT University, Vellore, on November 05, 2016.
4. Delivered an invited talk on "Image encryption using generalized heat equation associated in extended Vigenère cipher domain" during January 17-21, 2017, in the 3rd International Conference on Mathematics and Computing at Haldia Institute of Technology, West Bengal, India.
5. Delivered two hours of tutorial talk on "An overview of RGB image encryption techniques" during January 17-21, 2017, in the 3rd International Conference on Mathematics and Computing at Haldia Institute of Technology, West Bengal, India.
6. Delivered an invited talk on "Review of image encryption techniques" during December 23-24, 2019, in the International Conference on Mathematical Analysis and Computing at SSN College of Engineering, Chennai, Tamil Nadu, India.
7. Delivered an invited talk on "Sampling and quantization of continuous images and application" during March 08-09, 2022 in the Virtual 2^{nd} International workshop on sampling and approximation theory (IWSAT-2022) organized by the Department of Mathematics, SSN College of Engineering, Kalavakkam, Chennai, Tamil Nadu, India.
8. Delivered an invited talk on "A frame work of linear canonical transform on pseudo-differential operators" during December 22-23, 2022 in the 2^{nd} International Conference on Mathematical Analysis and Computing (ICMAC-2022) organized by the Department of Mathematics, SSN College of Engineering, Kalavakkam, Chennai, Tamil Nadu, India.