Explore the concept of differential privacy in this distinguished lecture by Cynthia Dwork from Harvard University's Radcliffe Institute for Advanced Study. Delve into the mechanisms, relaxations, and geometric aspects of differential privacy, understanding its importance and current applications. Examine case studies involving Facebook and the US Census Bureau, and investigate challenges such as overly accurate estimates and database reconstruction. Learn about differentially private synthetic data, hardness results, and future directions in the field. Engage with the Feinberg problem and sample-and-aggregate approaches, gaining insights into this crucial aspect of data privacy and its implications for statistical analysis and societal impact.