Let's Encryptは、非営利団体の Internet Security Research Group (ISRG) が提供する自動化されたフリーでオープンな認証局です。 548 Market St, PMB 77519, San Francisco, CA 94104-5401, USA すべての手紙またはお問い合わせを以下に送ってください： PO Box 18666, Minneapolis, MN 55418-0666, USA

On Thursday, September 3rd, 2020, Let’s Encrypt issued six new certificates: one root, four intermediates, and one cross-sign. These new certificates are part of our larger plan to improve privacy on the web, by making ECDSA end-entity certificates widely available, and by making certificates smaller. Given that we issue 1.5 million certificates every day, what makes these ones special? Why did we

It has long been a dream of ours for there to be a standardized protocol for certificate issuance and management. That dream has become a reality now that the IETF has standardized the ACME protocol as RFC 8555. I’d like to thank everyone involved in that effort, including Let’s Encrypt staff and other IETF contributors. Having a standardized protocol for certificate issuance and management is imp

Let’s Encrypt had a great year in 2017. We more than doubled the number of active (unexpired) certificates we service to 46 million, we just about tripled the number of unique domains we service to 61 million, and we did it all while maintaining a stellar security and compliance track record. Most importantly though, the Web went from 46% encrypted page loads to 67% according to statistics from Mo

Update, March 13, 2018 Wildcard certificate support is live. Let’s Encrypt will begin issuing wildcard certificates in January of 2018. Wildcard certificates are a commonly requested feature and we understand that there are some use cases where they make HTTPS deployment easier. Our hope is that offering wildcards will help to accelerate the Web’s progress towards 100% HTTPS. Let’s Encrypt is curr

Update, April 27, 2018 ACME v2 and wildcard support are fully available since March 13, 2018. Update, January 4, 2018 We introduced a public test API endpoint for the ACME v2 protocol and wildcard support on January 4, 2018. ACME v2 and wildcard support will be fully available on February 27, 2018. Let’s Encrypt will add support for the IETF-standardized ACME v2 protocol in January of 2018. We wil

We’re pleased to announce that we’ve received cross-signatures from IdenTrust, which means that our certificates are now trusted by all major browsers. This is a significant milestone since it means that visitors to websites using Let’s Encrypt certificates can enjoy a secure browsing experience with no special configuration required. Both Let’s Encrypt intermediate certificates, Let’s Encrypt Aut

Let’s Encrypt passed another major milestone by issuing our first certificate. You can see it in action here. Our cross signature is not yet in place, however this certificate is fully functional for clients with the ISRG root in their trust store. When we are cross signed, approximately a month from now, our certificates will work just about anywhere while our root propagates. We submitted initia

We can’t wait to see websites turn on TLS with Let’s Encrypt. Trust is our most important asset, however, and we need to take the necessary time to make sure our systems are secure and stable. We’ve decided to push our launch schedule back a bit to give us time to further improve our systems. Our new schedule is: First certificate: Week of September 7, 2015 General availability: Week of November 1

Let’s Encrypt has reached a point where we’re ready to announce our launch schedule. First certificate: Week of July 27, 2015 General availability: Week of September 14, 2015 We will issue the first end entity certificates under our root under tightly controlled circumstances. No cross-signature will be in place yet, so the certificates will not validate unless our root is installed in client soft