Explore the vulnerabilities of machine learning classifiers in security applications through this 20-minute conference talk from USENIX Enigma 2017. Delve into the reasons why classifiers, despite performing well in testing, can be easily thwarted by motivated adversaries in real-world scenarios. Examine how attackers construct evasive variants that are misclassified as benign, and understand the inherent fragility of many machine learning techniques, including deep neural networks. Learn about successful evasion techniques, including automated methods, and discover potential strategies to enhance classifier robustness against adversarial attacks. Gain insights into evaluating the resilience of deployed classifiers in adversarial environments, and understand the implications for the future of machine learning in security applications.