SC-081v3 and the End of the One-Year Certificate: A Field Guide to the 2026-2029 Lifetime Reductions

SC-081v3 is the CA/Browser Forum ballot that staged a phased reduction of public TLS certificate lifetimes from 398 days down to 47 days between March 2026 and March 2029. Apple proposed it. The CAs voted against it. It passed anyway, and it's alread...