Google has announced the AI Cyber Defense Initiative, aiming to enhance cybersecurity through artificial intelligence. Sundar Pichai, Google's CEO, highlighted the potential of AI to shift the balance in cyber security, addressing the defender's dilemma where defenders must be perfect, while attackers only need to succeed once. The initiative includes the launch of new AI security training programs and the open-sourcing of Magika, a tool previously used internally at Google for fast file identification via deep learning, which boosts file type identification accuracy by 30%. Magika has been evaluated for its effectiveness in protecting Gmail users and is now available for wider use. The initiative also features adversarial training techniques to make AI systems more robust against attacks. Google's move to open source Magika and offer free AI cyber tools aims to improve online security for organizations globally.