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Christophe’s excellent post caused me to think a bit about that period in 2014 and 2015 where we built Let’s Encrypt. There’s not much (certainly by comparison!), but I scribbled some notes on my blog, too: https:// insufficient.coffee/2025/12/03 /reflecting-on-lets-encrypt/ https:// infosec.exchange/@cbrocas/1156 54600635216276