Mehrab Najafian is currently pursuing a Ph.D. degree in cryptography and data security with the University of Victoria, in Victoria BC, Canada. He was doing research in his master’s program in applied mathematics on channel coding. He is also interested in combinatorial designs and logic games. So, he has been working on Sudoku puzzles and has designed new Sudoku puzzles. His research interests include discrete mathematics, coding theory, graph theory, combinatorial designs, cryptography, data analysis, and blockchain technology. He is looking forward to working on image processing and image encryption.