This international conference, organized from December 11 to 13, 2024 by the Laboratory of Mathematical Sciences and Applications (LaSMA) at the Faculty of Sciences Dhar El Mahraz-Fez, aims to show how basic and advanced mathematics are used in classical and modern cryptography. It also offers doctoral students in cryptography and related subjects the opportunity to attend conferences and courses given by specialists, to present and discuss parts of their research work with invited experts.