https://patrik.re/tags/defense-in-depth/ Vulnerability writeups and security research by Patrik Grobshäuser, Security Researcher at Assetnote / Searchlight Cyber. en-GB Wed, 25 Feb 2026 00:00:00 +0000 https://patrik.re/guardrails-that-actually-work/ https://patrik.re/guardrails-that-actually-work/ Wed, 25 Feb 2026 00:00:00 +0000 A four-layer defense model for AI email agents — because no single safety measure is enough when your inbox is on the line. patrik.reai-security