Academic Building (B3)-Room 
Department of Science for Technology
Faculty of Technology
University of Sri Jayewardenepura
Mahenwatte, Pitipana North
Homagama 10200
Sri Lanka

Email: kasuniwelihinda@sjp.ac.lk

Dr. B. A. Kasuni Welihinda received the B. Sc. (Special) degree in Mathematics from the University of Sri Jayewardenepura, Sri Lanka. She has completed her Ph.D. in Mathematics in the same university. After working as a Temporary Mathematics Instructor/Demonstrator, Temporary Research Assistant and a Lecturer (Probationary), she joined the Department of Science for Technology in the Faculty of Technology at the University of Sri Jayewardenepura in 2021 where she is currently working as a Lecturer (on-contract). Her research interests include Cryptography and Computer Security, Algebraic Graph theory and Group theory.

Research Keywords: Public-key Cryptography, Post-quantum Cryptography, Cryptanalysis, Group theory, Graph theory, Non-abelian groups

Other Activities: Watching movies/animes, Reading books/comics, Graphic designing, Listening to music

2021
Lecturer (on-contract), Department of Science for Technology, Faculty of Technology, University of Sri Jayewardenepura

2020
Lecturer (Probationary), Department of Business Studies, Faculty of Management and Social Science, Cinec campus, Malabe

2018-2019
Temporary Research Assistant, Department of Mathematics, Faculty of Applied Science, University of Sri Jayewardenepura

2017-2018
Temporary demonstrator, Department of Engineering Technology, Faculty of Technology, University of Sri Jayewardenepura

2016
Temporary demonstrator, Department of Mathematics, Faculty of Applied Science, University of Sri Jayewardenepura

2014
Intern, Department of Meteorology, Bhauddhaloka Mawatha, Colombo 07

The applications of Mathematics in the fields of Cryptography and Computer security are significant. The algorithms used in both Private and Public-key cryptosystems are based on mathematical concepts and intractable problems, especially related to Number theory, Group theory and Graph theory. With the rapid technological advancements at present, it is a crucial requirement to have secure and efficient cryptosystems to protect private information of users, maintain confidential communications between different parties etc. Moreover, after the discovery of vulnerabilities of the currently existing cryptosystems if the quantum computers are to be invented, which is actually expected in the near future, the attention of scientists and mathematicians are directed towards inventing novel algorithms for the post-quantum era. Many such algorithms are already being proposed, mainly based on concepts in Group theory. My research focus is on investigating improvements for the currently existing cryptosystems as well as development of novel post-quantum cryptographic algorithms while identifying possible cryptanalysis techniques applicable, which is notably related to the modern technology fields.

Lanel, G. H. J., Jinasena, T. M. K. K., & Welihinda, B. A. K. (2022). Semidirect products of finite groups in Public-key Cryptographic protocols, Journal of Information Science and Engineering, 38 (05), 1035-1050.

Lanel, G. H. J., Jinasena, T. M. K. K., & Welihinda, B. A. K. (2021). Cryptographic Protocols using Semidirect Products of Finite Groups, International Journal of Computer Science and Network Security, 21 (08), 17-27.

Lanel, G. H. J., Jinasena, T. M. K. K., & Welihinda, B. A. K. (2021). A Survey of Public-Key Cryptography over Non-abelian Groups, International Journal of Computer Science and Network Security, 21 (04), 289-300.

Lanel, G. H. J., Jinasena, T. M. K. K., & Welihinda, B. A. K. (2020). Hamiltonian cycles in Cayley graphs of semidirect products of finite groups, European Modern Studies Journal, 04 (03), 1-19.

Lanel, G. H. J., Pallage, H. K., Ratnayake, J. K., Thevasha, S., & Welihinda, B. A. K. (2019). A survey on Hamiltonicity in Cayley graphs and digraphs on different groups. Discrete Mathematics, Algorithms and Applications, 11(05), 1930002.

Sanjeewa, R., & Welihinda, B. A. K. (2016). Elliptic Curve Cryptography and Coding Theory. International Journal of Multidisciplinary Studies (IJMS), 03 (02).

3MT competition – 2021 organized by the Sri Lanka Academy of Young Scientists (submitted) on the topic Analysis of the exultancy of Hamiltonian cycles in Cayley graphs of groups of special orders and its applications to Public-key Cryptography.

Extended Abstract and Oral Presentation at the “3rd International Conference on Multidisciplinary Approaches (iCMA) – 2016”, jointly organized by the Faculty of Graduate Studies, University of Sri Jayewardenepura and Ministry of Science, Technology and Research under the topic Elliptic Curve Cryptography and Coding Theory.

Poster Presentation at the “International Industrial Mathematics Conference (I²MC – I)” organized by the Department of Mathematics, University of Sri Jayewardenepura under the same topic (2016).

Sanjeewa, R., & Welihinda, B. A. K. (2017). Elliptic Curve Cryptography and Coding Theory. LAP LAMBERT Academic Publishing, Germany.