In 2018, Israel presented some materials allegedly intended to demonstrate Iran's capabilities for developing nuclear weapons. During that presentation the Israeli PM showed a video of an implosion simulation generated using the LS-DYNA (ls-prepost) software, the same kind of simulation and software targeted by Fast16. After analyzing the video I found that the uranium core is being compressed to more than double (~2.5x) its density, something objectively beyond Iran's capabilities and the physics of an early stage High Explosives-based implosion mechanism, but that coincidentally matches the Fast16 sabotage. In this post I elaborate on why I consider this a plausible option by analyzing Fast16 from a cyber-physical perspective, and providing the required verifiable data from reference books and academic publications on the matter. As usual, the regular disclaimer: what I do is physics-informed reverse engineering, I'm not a physicist . My priority is always to provide ...