Explore a Black Hat conference talk that delves into the vulnerabilities of biometric authentication systems. Learn about an arsenal of techniques for attacking liveness detection, including methods to bypass 2D/3D facial authentication and voiceprint authentication products. Discover how injecting fake video or audio streams and creating specific recognition scenes can exploit weaknesses in liveness detection algorithms. Gain insights into the research, requirements, and schematics behind these attacks, as well as potential mitigation strategies. Follow the presenters through demonstrations of audio conversion techniques and new threat modes, understanding the challenges and implications for biometric security.