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Let's Encrypt to Reduce Certificate Lifetimes to 45 Days by 2028

Let's Encrypt to Reduce Certificate Lifetimes to 45 Days by 2028

First seen 3 Dec 2025, 05:38 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Let's Encrypt announced it will reduce the validity period of its certificates from 90 days to 45 days by 2028. This change aligns with industry standards set by the CA/Browser Forum Baseline Requirements, affecting all publicly-trusted Certificate Authorities. The move aims to enhance security by limiting the duration of certificate validity.

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