Squarespace OCSP Stapling Implementation
We’re excited that Squarespace has decided to protect the millions of sites they host with HTTPS! While talking with their
team we learned they were...
Introducing Internationalized Domain Name (IDN) Support
Let’s Encrypt is pleased to introduce support for issuing certificates that contain Internationalized Domain Names (IDNs). This means that our users around the world...
DDoS’s Newest Minions: IoT Devices (Volume 1)
The latest evolution of cyber weapons is brought to you by the default passwords in Internet of Things (IoT) devices. - Read more
ISRG Legal Transparency Report, January 2016 – June 2016
The trust of our users is ISRG’s most critical asset. Transparency regarding legal requests is an important part of making sure our users can...
What It Costs to Run Let’s Encrypt
Today we’d like to explain what it costs to run Let’s Encrypt. We’re doing this because we strive to be a transparent organization, we...
Let’s Encrypt Root to be Trusted by Mozilla
The Let’s Encrypt root key (ISRG Root X1) will be trusted by default in Firefox 50, which is scheduled to ship in Q4 2016....
Web Injection Threats: The Cost of Community Engagement on Your Site
Customer engagement drives web application design, but user-generated content brings inherent security challenges. - Read more
Latest article
CyberSentinel AI with 33 Security Tools, Including Nmap, SQLMap, ZAP, and uses Claude, GPT
A new open-source cybersecurity platform called CyberSentinel AI v3.0 has emerged as a significant development in autonomous security tooling, combining 33 real-world penetration testing...
CVE-2025-5791 Users: `root` appended to group listings
Information published. - Read more
JCPenney – 368,418 breached accounts
In June 2026, retailer JCPenney and associated brands were targeted in a ShinyHunters "pay or leak" extortion campaign. Data allegedly obtained from JCPenney through...
Threat actor adds advanced ‘EDR killer’ tools to ransomware-as-a-service platform
One of the world’s top ransomware groups has given its criminal affiliates access to advanced tools capable of successfully disabling...
