Explore a conference talk on Ghostor, a secure data-sharing system built on decentralized trust. Learn about a novel approach to protecting user privacy and data integrity from compromised servers. Discover how Ghostor hides user identities and allows detection of server-side integrity violations without relying on centralized trust. Understand the system's innovative design, which avoids per-user authentication and user-specific mailboxes. Delve into the concept of verifiable anonymous history and how Ghostor utilizes blockchain technology minimally. Examine the system's architecture, implementation challenges, and performance metrics. Gain insights into the trade-offs between security, privacy, and system overhead in data-sharing applications.