As 6G moves from vision to architecture, its defining features — extreme decentralization, AI-native operation, massive device heterogeneity, ultra-low latency and sustainable-driven design — introduce profound security and trust challenges beyond those faced in 5G. Unlike previous generations, 6G is not only expected to connect more users and services but also to do so across a continuum that spans from cloud to edge to device, including resource-constrained endpoints, mission-critical systems, and autonomous agents. Find more here: https://6g-ia.eu/wp-content/uploads/2025/11/6g-ia_security-wg_white-paper_nov25_final.pdf