#Privacy
4 posts in tag “Privacy”.
Differential Privacy: Formal Guarantees, Composition Theorems, and the Engineering of Private Systems
2025-08-12Build differential privacy from first principles: the formal (ε, δ)-definition, the Laplace and Gaussian mechanisms, composition theorems (basic and advanced), the sparse vector technique, and how to engineer practical private data systems at scale.
Anonymous Communication: Onion Routing, Mix Networks, DC-Nets, and the Anonymity Trilemma
2023-09-25A rigorous analysis of anonymous communication systems from Tor's onion routing through mix networks like Loopix and Nym to DC-nets, exploring the anonymity trilemma and traffic analysis resistance.
Oblivious RAM and Private Information Retrieval: Hiding Access Patterns from the Storage Server
2023-01-10A comprehensive tour of ORAM and PIR: the square-root construction, tree-based Path ORAM, computational and information-theoretic PIR schemes, and the fundamental lower bounds that constrain the overhead.
Instrumenting Without Spying: Privacy-Preserving Telemetry at Scale
2021-05-27How we rebuilt our telemetry pipeline to respect user privacy without sacrificing insight.