Privacy Theater Is Not Privacy Engineering: What It Actually Takes to Ship Safe AI

Privacy Theater Is Not Privacy Engineering: What It Actually Takes to Ship Safe AI

April 15, 2026 · 1h 7m

About this episode

The episode discusses the misconceptions of AI privacy and the technical measures necessary for building safe AI systems.

Katharine Jarmul , Privacy in ML/AI Expert & Author of Practical Data Privacy , joins Hugo to unpack why most AI privacy advice is theater: and what technical privacy actually looks like when you’re shipping LLMs, agents, and multimodal systems into the real world. In this episode, we dig into how to build defensible systems in an era of AI agents and multimodal models : why system prompts (and your entire agent harness!) should be considered public by default , and why “privacy observability” is as critical as data observability for anyone building with LLMs today. Multimodal is what changes the threat model: identifiers hide in images, audio, and metadata, not just text, and the old anonymization playbook doesn’t cover it. Vanishing Gradients is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber. We Discuss: * No Convenience Tax , you don’t have to trade privacy for utility: high-utility AI products can be privacy-preserving through technical controls like privacy routing and input sanitization ; * Public Prompts and Harnesses : assume any instruction or secret in a system prompt or agent harness will be…

People in this episode

Host: Hugo Bowne-Anderson

Guest: Katharine Jarmul

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Books & works: Practical Data Privacy

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