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Let's Encrypt to Shorten Certificate Lifetimes to 64 Days
Let's Encrypt has announced a shift to 64-day certificate lifetimes as the default for all subscribers, effective February 10, 2027. The organization stated this change is intended to mitigate the risks associated with key compromise and incorrect issuance. Furthermore, Let's Encrypt will reduce its authorization reuse period to 10 days and advises users to begin testing their automated renewals in a staging environment starting October 14, 2026.
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