EFF is proud to introduce Certbot, a powerful tool to help websites encrypt their traffic. Certbot is the next iteration of the Let's Encrypt Client; it obtains TLS/SSL certificates and can automatically configure HTTPS encryption on your server. It's still in beta for now, but we plan to release Certbot 1.0 later this year.
As you may know, Let’s Encrypt is a certificate authority, co-founded by EFF, Mozilla, and researchers from the University of Michigan. With the help from many others, Let’s Encrypt is now one of the world’s largest certificate authorities, used by millions of people around the world to enable HTTPS on their website.
Certbot communicates with the Let’s Encrypt CA through a protocol called ACME. While there are many ACME clients available to choose from, Certbot continues to be the most popular choice for organizations and developers that run their own webservers.