Security engineer writing about platform security, cryptography, and building systems that fail safe.https://abhishekreddy.com/en-ushttps://abhishekreddy.com/blog/fail-closed-as-a-design-discipline/https://abhishekreddy.com/blog/fail-closed-as-a-design-discipline/A control that fails open is a control that isn't there when it matters. Notes on building systems where the error path is also the safe path.Sun, 14 Dec 2025 00:00:00 GMTdesignauthzresiliencehttps://abhishekreddy.com/blog/certificate-rotation-that-doesnt-page-you/https://abhishekreddy.com/blog/certificate-rotation-that-doesnt-page-you/Most mTLS outages aren't attacks — they're expiry. A few design choices turn rotation from a recurring incident into a non-event.Sun, 02 Nov 2025 00:00:00 GMTmtlspkireliability