Let's Encrypt

A nonprofit Certificate Authority providing TLS certificates to 300M websites and a project from ISRG. This is account is not regularly monitored. To get in touch for technical issues, please visit our community forum: community.letsencrypt.org/

abetterinternet.org/careers

Let's Encrypt boosted:
Matthew McPherrinmattm@infosec.exchange
2023-09-25

citizenlab.ca/2023/09/predator

> Eltantawy’s Vodafone Egypt mobile connection was persistently selected for targeting via network injection; when Eltantawy visited certain websites not using HTTPS, a device installed at the border of Vodafone Egypt’s network automatically redirected him to a malicious website to infect his phone with Cytrox’s Predator spyware.

Plaintext HTTP is unsafe. Every website should be on HTTPS.

2023-09-05

This week's to do list: issue 21,000,000 free certs.

2023-08-31

Dozens and dozens of companies and organizations have sponsored Let's Encrypt over the years. Has yours? abetterinternet.org/sponsor/

2023-08-30

Our work with Web security extends beyond TLS certificates. Our sibling project,
@ProssimoISRG
, works to provide critical parts of the Internet with memory safe alternatives. Give them a follow to stay updated on their progress!

2023-08-29

Our work is 100% funded by charitable contributions. That means every time you visit a website using Let's Encrypt (and there are 300+ million to pick from), that security and privacy was made possible by generosity (and a bit of technical innovation). letsencrypt.org/donate/

2023-08-27

Heading into Monday with our eye on issuing a few million certs. 😎

2023-08-26

A very small number of oragnizations run CT logs yet they're a fundamental part of the web PKI. Let's Encrypt's CT log, Oak, is the only fully open source stack. letsencrypt.org/2022/05/19/nur

2023-08-23

Let's Encryptをサポートするには、寄付金以外にもたくさんの方法があります。 コミュニティフォーラムで支援したり、Githubに貢献したり、Crowdinで翻訳を行ったりすることができます。

2023-08-22

Let's Encrypt is an open-source certificate authority that provides free TLS certificates for the public's benefit.

2023-08-20

That's quite a list. Thank you to every one of our sponsors both new this year and those with us since the beginning! letsencrypt.org/sponsors/

2023-08-19

Making our website available in as many languages as we can is part of our mission to make Internet security more accessible. You can help us out in this effort by contributing translations on our Crowdin:

2023-08-18

Today from the Let's Encrypt Glossary: CAA
letsencrypt.org/docs/glossary/

2023-08-14

On deck for this week: issue twenty one million free TLS certificates.

2023-08-14
2023-08-14

Every donation matters, no matter what size. Your support of Let's Encrypt will still have an impact on our work!

2023-08-11

Naysayers: "Scaling up free, automated TLS issuance is impossible."
Let's Encrypt:

2023-08-10

Whether you're a security pro or just someone who sees these Let's Encrypt tweets from their friends, you benefit from TLS certificates. Your donations help us continue securing the Web.

2023-08-09

Ten years ago our parent nonprofit, ISRG, was founded. Since then we've been dedicated to building a brighter, better Web for everyone, everywhere: abetterinternet.org/tenth-anni

2023-08-07

Thanks to heise online for their article highlighting our work to make the Web more secure alongside our founding sponsor and partner Electronic Frontier Foundation. We're proud to look back at the impact of our parent nonprofit as we celebrate our 10th anniversary.

Read the article here: heise.de/hintergrund/10-Jahre-

2023-08-06

If you have a question about your certificates, or just need help navigating the world of TLS, consider visiting our community forum for support:

Client Info

Server: https://mastodon.social
Version: 2025.04
Repository: https://github.com/cyevgeniy/lmst