Let’s Encrypt

Let’s Encrypt TLS certificate lifetimes to drop from 90 to 64 days starting February 2027

October 12, 2026

Websites that rely on Let’s Encrypt will soon have to renew their TLS certificates more often. Starting February 10, 2027, the certificate authority will issue certificates …

Let’s Encrypt works toward post-quantum certificates at web scale

June 5, 2026

Let’s Encrypt plans to pursue a post-quantum-safe Web PKI through Merkle Tree Certificates (MTCs), a new approach that adds post-quantum authentication to the web without …

Let’s Encrypt rolls out 6-day and IP-based certificates

January 20, 2026

Let’s Encrypt says its short-lived TLS certificates with a 6-day lifetime are now generally available. Each certificate is valid for 160 hours from the time it is issued. To …

Evaluating the use of encryption across the world’s top one million sites

June 30, 2022

A new report from security researcher and TLS expert Scott Helme, evaluates the use of encryption across the world’s top one million sites over the last six months and reveals …

Let’s Encrypt will revoke 3m+ TLS/SSL certificates

March 4, 2020

Starting with 20:00 UTC (3:00pm US EST), today (March 4), the non-profit certificate authority Let’s Encrypt will begin it’s effort to revoke a little over 3 …

Explosion of look-alike domains aims to steal sensitive data from online shoppers

October 1, 2018

Venafi released research on the explosion of look-alike domains, which are routinely used to steal sensitive data from online shoppers. Venafi’s research analyzed suspicious …

Let’s Encrypt CA inadvertently leaks users’ email addresses

June 13, 2016

Let’s Encrypt, the non-profit Certificate Authority (CA) that helps website administrators switch from HTTP to HTTPS quickly and effortlessly, has accidentally leaked …