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Let's Encrypt is a free, automated, and open certificate authority brought to you by the nonprofit <a href="https://www.abetterinternet.org/">Internet Security Research Group (ISRG)</a>. Read all about our nonprofit work this year in our <a href="https://www.abetterinternet.org/annual-reports/">2023 Annual Report</a>.
Site URL: letsencrypt.org/
Feed URL: letsencrypt.org/feed.xml
Posts: 8
Followers: 3
Intent to End OCSP Service
https://letsencrypt.org/2024/07/23/replacing-ocsp-with-crls.html
Published: July 23, 2024 00:00
Today we are announcing our intent to end Online Certificate Status Protocol (OCSP) support in favor of Certificate Revocation Lists (CRLs) as soon as possible. OCSP and CRLs are both mechanisms by which CAs can communicate certificate revocation…
More Memory Safety for Let’s Encrypt: Deploying ntpd-rs
https://letsencrypt.org/2024/06/24/ntpd-rs-deployment.html
Published: June 24, 2024 00:00
When we look at the general security posture of Let’s Encrypt, one of the things that worries us most is how much of the operating system and network infrastructure is written in unsafe languages like C and C++. The CA software itself is written in memory…
Let’s Encrypt Continues Partnership with Princeton to Bolster Internet Security
https://letsencrypt.org/2024/05/30/princeton-partnership.html
Published: May 30, 2024 00:00
Let’s Encrypt is proud to have been partnering with the Center for Information Technology Policy team at Princeton University since 2018 to bolster defenses against Border Gateway Protocol (BGP) attacks. We’re thrilled to continue this partnership thanks…
Takeaways from Tailscale’s Adoption of ARI
https://letsencrypt.org/2024/05/01/ari-in-tailscale.html
Published: May 1, 2024 00:00
Since March 2023, Let’s Encrypt has been improving our resiliency and reliability via ACME Renewal Information (ARI). ARI makes it possible for our Subscribers to handle certificate revocation and renewal easily and automatically. A primary benefit of ARI…
An Engineer’s Guide to Integrating ARI into Existing ACME Clients
https://letsencrypt.org/2024/04/25/guide-to-integrating-ari-into-existing-acme-clients.html
Published: April 25, 2024 00:00
Following our previous post on the foundational benefits of ACME Renewal Information (ARI), this one offers a detailed technical guide for incorporating ARI into existing ACME clients. Since its introduction in March 2023, ARI has significantly enhanced…
Deploying Let's Encrypt's New Issuance Chains
https://letsencrypt.org/2024/04/12/changes-to-issuance-chains.html
Published: April 12, 2024 00:00
On Thursday, June 6th, 2024, we will be switching issuance to use our new intermediate certificates. Simultaneously, we are removing the DST Root CA X3 cross-sign from our API, aligning with our strategy to shorten the Let’s Encrypt chain of trust. We will…
New Intermediate Certificates
https://letsencrypt.org/2024/03/19/new-intermediate-certificates.html
Published: March 19, 2024 00:00
On Wednesday, March 13, 2024, Let’s Encrypt generated 10 new Intermediate CA Key Pairs, and issued 15 new Intermediate CA Certificates containing the new public keys. These new intermediate certificates provide smaller and more efficient certificate chains…
Introducing Sunlight, a CT implementation built for scalability, ease of operation, and reduced cost
https://letsencrypt.org/2024/03/14/introducing-sunlight.html
Published: March 14, 2024 00:00
Let’s Encrypt is proud to introduce Sunlight, a new implementation of a Certificate Transparency log that we built from the ground up with modern Web PKI opportunities and constraints in mind. In partnership with Filippo Valsorda, who led the design and…