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Let's Encrypt

The difficulty of making sure your website is broken Simplifying Certificate Renewals for Millions of Domains with ACME Renewal Information (ARI) Six-Day and IP Address Certificates Available in Certbot Shorter Certificate Lifetimes and Rate Limits DNS-PERSIST-01: A New Model for DNS-based Challenge Validation On the Importance of "Hello" and "Thanks" 6-day and IP Address Certificates are Generally Available 10 Years of Let's Encrypt Certificates Decreasing Certificate Lifetimes to 45 Days New "Generation Y" Hierarchy of Root and Intermediate Certificates Ten Years of Community Support ACME Renewal Information (ARI) Published as RFC 9773 Native ACME Support Comes to NGINX End of Life Plan for RFC 6962 Certificate Transparency Logs OCSP Service Has Reached End of Life We've Issued Our First IP Address Certificate Expiration Notification Service Has Ended Reflections on a Year of Sunlight How We Reduced the Impact of Zombie Clients Sustaining a More Secure Internet: The Power of Recurring Donations Ending TLS Client Authentication Certificate Support in 2026 How Pebble Supports ACME Client Developers Ten Years of Let's Encrypt: Announcing support from Jeff Atwood We Issued Our First Six Day Cert Encryption for Everybody Scaling Our Rate Limits to Prepare for a Billion Active Certificates Ending Support for Expiration Notification Emails Announcing Six Day and IP Address Certificate Options in 2025 Announcing Certificate Profile Selection Ending OCSP Support in 2025 Intent to End OCSP Service More Memory Safety for Let’s Encrypt: Deploying ntpd-rs Let’s Encrypt Continues Partnership with Princeton to Bolster Internet Security Takeaways from Tailscale’s Adoption of ARI An Engineer’s Guide to Integrating ARI into Existing ACME Clients Deploying Let's Encrypt's New Issuance Chains New Intermediate Certificates Introducing Sunlight, a CT implementation built for scalability, ease of operation, and reduced cost A Year-End Letter from our Vice President Our role in supporting the nonprofit ecosystem Increase your security governance with CAA Shortening the Let's Encrypt Chain of Trust ISRG’s 10th Anniversary Improving Resiliency and Reliability for Let’s Encrypt with ARI Thank you to our 2023 renewing sponsors A Look into the Engineering Culture at ISRG Let’s Encrypt improves how we manage OCSP responses A New Life for Certificate Revocation Lists Nurturing Continued Growth of Our Oak CT Log TLS Beyond the Web: How MongoDB Uses Let’s Encrypt for Database-to-Application Security Let’s Encrypt Receives the Levchin Prize for Real-World Cryptography New Major Funding from the Ford Foundation TLS Simply and Automatically for Europe’s Largest Cloud Customers Making the Web safer and more secure for everyone Resources for Certificate Chaining Help Speed at scale: Let’s Encrypt serving Shopify’s 4.5 million domains Preparing to Issue 200 Million Certificates in 24 Hours The Next Gen Database Servers Powering Let's Encrypt Extending Android Device Compatibility for Let's Encrypt Certificates Standing on Our Own Two Feet [Updated] Let's Encrypt's New Root and Intermediate Certificates Let's Encrypt Has Issued a Billion Certificates Multi-Perspective Validation Improves Domain Validation Security How Let's Encrypt Runs CT Logs Onboarding Your Customers with Let's Encrypt and ACME Introducing Oak, a Free and Open Certificate Transparency Log Transitioning to ISRG's Root The ACME Protocol is an IETF Standard Facebook Expands Support for Let’s Encrypt Looking Forward to 2019 Let's Encrypt Root Trusted By All Major Root Programs Engineering deep dive: Encoding of SCTs in certificates Looking Forward to 2018 ACME Support in Apache HTTP Server Project Wildcard Certificates Coming January 2018 Milestone: 100 Million Certificates Issued ACME v2 API Endpoint Coming January 2018 OVH Renews Platinum Sponsorship of Let's Encrypt Let’s Encrypt 2016 In Review Launching Our Crowdfunding Campaign Our First Grant: The Ford Foundation Squarespace OCSP Stapling Implementation Introducing Internationalized Domain Name (IDN) Support ISRG Legal Transparency Report, January 2016 - June 2016 What It Costs to Run Let's Encrypt Let's Encrypt Root to be Trusted by Mozilla Full Support for IPv6 Defending Our Brand [Updated] Progress Towards 100% HTTPS, June 2016 Leaving Beta, New Sponsors ISRG Legal Transparency Report, July 2015 - December 2015 New Name, New Home for the Let's Encrypt Client Software Our Millionth Certificate OVH Sponsors Let's Encrypt Entering Public Beta Facebook Sponsors Let's Encrypt Public Beta: December 3, 2015 Why ninety-day lifetimes for certificates? The CA's Role in Fighting Phishing and Malware Let's Encrypt is Trusted
A Year-End Letter from the Executive Director of Let's Encrypt and ISRG
2020-12-28 · via Let's Encrypt

By Josh Aas ·

This letter was originally published in our 2020 annual report.

ISRG’s first project, Let’s Encrypt, has been wildly successful. We’re now helping to secure more than 225 million websites and the Web is making great progress towards 100% HTTPS. We’ve put in a lot of hard work and dealt with some challenges along the way, but at a high level the outlook is quite sunny. I’m incredibly proud to share some of what our organization has accomplished in 2020.

While I’m deeply appreciative of being in this position today, I don’t let it distract me, or our fantastic Board of Directors, from thinking diligently about the risks on the road ahead. A big part of our job is to look into the future, see threats and challenges, and prepare to face them as best we can. I’m sometimes asked what I view as the biggest threat to our organization and our ability to pursue our mission and my answer is simple: being taken for granted.

When digital security and privacy is your goal, ease of use has to be your focus. When we examine why real world systems aren’t secure, it usually isn’t because we don’t have the technological means to secure them. The problem is almost always that the solutions are not easy enough to use, either for implementers or consumers.

HTTPS has been around since the mid-90s but uptake was abysmally slow because SSL/TLS certificates weren’t easy to get or manage. Let’s Encrypt made getting and managing certificates easy and as a result HTTPS adoption rates shot up. Critically, the answer wasn’t to get people to think more about their certificates—we needed to make it possible for people to spend much less time thinking about certificates. Ideally we’d be invisible—server software should just get and manage certificates automatically.

Our next project after Let’s Encrypt is going live shortly: Divvi Up. It’s a system for collecting digital metrics that allows organizations to collect the information they need without any entity having the ability to access any individual user’s data. Much like Let’s Encrypt, it protects people without them having to know anything about it.

Despite 2020 being a year of unprecedented, global challenges, ISRG is well positioned for the years ahead. Our current momentum is possible through new major in-kind donations, nearly 90% of our existing sponsors renewing their support for 2020, funding from the Ford Foundation and the Bill & Melinda Gates Foundation, and by welcoming new major sponsors, including AWS, Thales, and Avast.

When your strategy as a nonprofit is to get out of the way, to offer services that people don’t need to think about, you’re running a real risk that you’ll eventually be taken for granted. There is a tension between wanting your work to be invisible and the need for recognition of its value. If people aren’t aware of how valuable our services are then we may not get the support we need to continue providing them.

How are we going to mitigate this risk? The most important thing we can do is continue to communicate effectively with people who are in a position to understand our work and support it. The most important things you can do as a supporter include being an advocate for your company sponsoring us, making an individual donation, or going over this annual report with a few people that you think should know more about us.

On behalf of the hundreds of millions of people benefiting from Let’s Encrypt around the world and our team of sixteen dedicated to this work, thank you for your support.