Explore a 28-minute Black Hat conference talk examining user perspectives on the balance between security and usability in digital communications. Delve into the challenges of implementing end-to-end encryption for message privacy and the recent developments in key-directory services. Analyze findings from a 52-person interview study comparing traditional key-exchange models with key-directory-based registration models. Gain insights into user understanding of security tradeoffs and their preferences for everyday digital communication protection. Learn how participants evaluated the convenience and security levels of different encryption methods, and discover their attitudes towards "good enough" security for various purposes.