Ms. Shiza Tahir is working as Assistant Lecturer in Department of Mathematics, GC Women University Sialkot since 2015. She has completed her M.Sc. degree in Mathematics from University of Punjab and MPhil in Mathematics from University of Management and Technology, Sialkot. Her research interests include Cryptography and Number Theory. In cryptography, she is particularly studying the Construction of AES S-box and continuing her research for development of a novel S-box which can strengthen the modern computer security. She is rescue coordinator of GCWUS and participated as Cert Observer in 3rd National Certs Challenge 2019 held at Emergency Services Academy Lahore. She is actively engaged in various administrative tasks and a hardworking member of different departmental committees.