Let’s Encrypt 是一个免费、开放，自动化的证书颁发机构，由 ISRG（Internet Security Research Group）运作。
ISRG 是一个关注网络安全的公益组织，其赞助商从非商业组织到财富100强公司都有，包括 Mozilla、Akamai、Cisco、Facebook，密歇根大学等等。ISRG 以消除资金，技术领域的障碍，全面推进加密连接成为互联网标配为自己的使命。
Let’s Encrypt 项目于2012年由 Mozilla 的两个员工发起，2014年11年对外宣布公开，2015年12月3日开启公测。
Let’s Encrypt：ACME v2和通配符支持将于2018年2月27日全面上市。
Update, January 4, 2018
We introduced a public test API endpoint for the ACME v2 protocol and wildcard support on January 4, 2018. ACME v2 and wildcard support will be fully available on February 27, 2018.
Let’s Encrypt will begin issuing wildcard certificates in January of 2018. Wildcard certificates are a commonly requested feature and we understand that there are some use cases where they make HTTPS deployment easier. Our hope is that offering wildcards will help to accelerate the Web’s progress towards 100% HTTPS.
Let’s Encrypt is currently securing 47 million domains via our fully automated DV certificate issuance and management API. This has contributed heavily to the Web going from 40% to 58% encrypted page loads since Let’s Encrypt’s service became available in December 2015. If you’re excited about wildcard availability and our mission to get to a 100% encrypted Web, we ask that you contribute to our summer fundraising campaign.
A wildcard certificate can secure any number of subdomains of a base domain (e.g. *.example.com). This allows administrators to use a single certificate and key pair for a domain and all of its subdomains, which can make HTTPS deployment significantly easier.
Wildcard certificates will be offered free of charge via our upcoming ACME v2 API endpoint. We will initially only support base domain validation via DNS for wildcard certificates, but may explore additional validation options over time. We encourage people to ask any questions they might have about wildcard certificate support on our community forums.
We decided to announce this exciting development during our summer fundraising campaign because we are a nonprofit that exists thanks to the generous support of the community that uses our services. If you’d like to support a more secure and privacy-respecting Web, donate today!
We’d like to thank our community and our sponsors for making everything we’ve done possible. If your company or organization is able to sponsor Let’s Encrypt please email us at firstname.lastname@example.org.