In this document I present the main aspects of my first research experience as an intern at Inria supervised by Anne Canteaut & Léo Perrin within the COSMIQ team from March to August 2021. We focus on Ascon, a lightweight symmetric cipher submitted to the current NIST standardization process. We mostly analyze different properties which could lead to cube attacks. A presentation of Ascon and a non-exhaustive literature review are drawn as complements to the chronological overview of the work done during these six months. They altogether enable to assess the hindsight obtained month after month. This internship is part of the requirements to get my Master’s degree from UVSQ (Université de Versailles Saint-Quentin-en-Yvelines, M2 Algèbre appliquée).