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Let’s Encrypt Launches 6-Day TLS Certificates and IP-Based Options

Let’s Encrypt Launches 6-Day TLS Certificates and IP-Based Options

First seen 21 Jan 2026, 06:39 UTC • •

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

Let’s Encrypt has introduced short-lived TLS certificates with a 6-day lifetime, now generally available for operators. These certificates, valid for 160 hours, require users to opt-in and select the 'shortlived' profile in their ACME client. The rollout also includes IP address-based certificates, addressing security issues in certificate management.

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