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Issuance disruption

We're seeing elevated rates of validation failures that shouldn't be happening. We're investigating, and expect to resolve the issue soon.

offiziell · 20. Okt., 02:28, 25 Minuten lang, behoben

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Ankündigungen

64-Day Certificate Lifetimes Coming Feb 2027

On February 10, 2027, all Let’s Encrypt subscribers will move to certificates with 64 day lifetimes by default unless they select an even shorter lifetime (45 or 6 days, as previously announced ). This means that any certificate we issue o…

gemeldet 7. Okt. 2026

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How We Built a Data Warehouse Using ClickHouse

When the scripts that generate the data for letsencrypt.org/stats broke yet again, we decided to retire them rather than repair them. Let’s Encrypt issues six to ten million certificates each day , producing a large volume of logs that kee…

gemeldet 17. Sept. 2026

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Going Back to Our Roots: A Little Piece of Let's Encrypt History

Ten years ago, we printed one of the nerdiest t-shirts we’ve ever made. On the front was the entire PEM encoding of ISRG Root X1 in base64. Back then, it represented a future we were working toward. Today, that same design tells the story …

gemeldet 11. Aug. 2026

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A Post-Quantum Future for Let's Encrypt

Let’s Encrypt is committed to a post-quantum-safe Web PKI. The path we’re planning to take is Merkle Tree Certificates (“MTCs”), a new approach that adds post-quantum authentication to the web without sacrificing the speed and reliability …

gemeldet 3. Juni 2026

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The difficulty of making sure your website is broken

Have you ever needed to make sure your website has a broken certificate? While many tools exist to help run an HTTPS server with valid certificates, there aren’t tools to make sure your certificate is revoked or expired. This is not a prob…

gemeldet 10. April 2026

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Six-Day and IP Address Certificates Available in Certbot

This was also posted on EFF’s blog . As we announced earlier this year, Let’s Encrypt now issues IP address and six-day certificates to the general public. The Certbot team at the Electronic Frontier Foundation has been working on two impr…

gemeldet 11. März 2026

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Shorter Certificate Lifetimes and Rate Limits

As previously announced , over the next two years we will be switching the default certificate lifetime from 90 days to 64 days, and then 45 days. This will ultimately double the number of certificate renewal requests each day: today we ex…

gemeldet 24. Feb. 2026

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DNS-PERSIST-01: A New Model for DNS-based Challenge Validation

When you request a certificate from Let’s Encrypt, our servers validate that you control the hostnames in that certificate using ACME challenges . For subscribers who need wildcard certificates or who prefer not to expose infrastructure to…

gemeldet 18. Feb. 2026

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On the Importance of "Hello" and "Thanks"

In a recent conversation with a Let’s Encrypt subscriber, we asked them to guess how many people work at ISRG, the nonprofit behind Let’s Encrypt (and Prossimo and Divvi Up). Their guess was about 100; they’d overestimated by 72.5 people. …

gemeldet 5. Feb. 2026

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