About Let's Encrypt

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Let’s Encrypt is a free, automated, and open certificate authority (CA), run for the public’s benefit. It is a service provided by the Internet Security Research Group (ISRG).

We give people the digital certificates they need in order to enable HTTPS (SSL/TLS) for websites, for free, in the most user-friendly way we can. We do this because we want to create a more secure and privacy-respecting Web.

You can read about our most recent year in review by downloading our annual report (Desktop, Mobile).

The key principles behind Let’s Encrypt are:

We have a page with more detailed information about how the Let’s Encrypt CA works.