The Zero-Trust model is emerging as a strategic response to modern threats, based on a simple principle: never trust, always verify. But between stated ambitions and the reality of existing information systems, integrating Zero-Trust remains a major challenge for businesses and public institutions alike. How can you assess your organisation’s readiness for this paradigm shift? How can you integrate Zero Trust principles into an existing IT system without rebuilding everything? Which technological building blocks should you use (identity, micro-segmentation, supervision, IAM, SASE)? What governance should you put in place to align security, business and IT? There are many technical, organisational and operational challenges associated with implementing Zero Trust in complex, often heterogeneous and interconnected environments.