为1.8亿个网站提供TLS证书的非盈利性证书颁发机构。

阅读我们的2019年度报告

博客文章

  • A Year-End Letter from the Executive Director of Let's Encrypt and ISRG

    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.

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  • Extending Android Device Compatibility for Let's Encrypt Certificates

    We’re happy to announce that we have developed a way for older Android devices to retain their ability to visit sites that use Let’s Encrypt certificates after our cross-signed intermediates expire. We are no longer planning any changes in January that may cause compatibility issues for Let’s Encrypt subscribers.

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  • Standing on Our Own Two Feet [Updated]

    When a new Certificate Authority (CA) comes on the scene, it faces a conundrum: In order to be useful to people, it needs its root certificate to be trusted by a wide variety of operating systems (OSes) and browsers. However, it can take years for the OSes and browsers to accept the new root certificate, and even longer for people to upgrade their devices to the newer versions that include that change.

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