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March 03, 2026 6:00 AM
How Cloudy translates complex security into human action
Cloudy is our LLM-powered explanation layer built directly into Cloudflare One. Its explanations, now part of Phishnet and API CASB, can improve user decisions and SOC efficiency....
March 03, 2026 6:00 AM
From reactive to proactive: closing the phishing gap with LLMs
Email security is a constant arms race. Like WWII engineers reinforcing only the planes that returned, survivorship bias hides real gaps. But LLMs can help us find the invisible weaknesses....
February 27, 2026 6:00 AM
Bringing more transparency to post-quantum usage, encrypted messaging, and routing security
Cloudflare Radar has added new tools for monitoring PQ adoption, KT logs for messaging, and ASPA routing records to track the Internet's migration toward more secure encryption and routing standards. ...
February 05, 2026 2:00 PM
2025 Q4 DDoS threat report: A record-setting 31.4 Tbps attack caps a year of massive DDoS assaults
The number of DDoS attacks more than doubled in 2025. The network layer is under particular threat as hyper-volumetric attacks grew 700%....
January 27, 2026 2:00 PM
Building a serverless, post-quantum Matrix homeserver
As a proof of concept, we built a Matrix homeserver to Cloudflare Workers — delivering encrypted messaging at the edge with automatic post-quantum cryptography....
January 19, 2026 2:00 PM
How we mitigated a vulnerability in Cloudflare’s ACME validation logic
A vulnerability was recently identified in Cloudflare’s automation of certificate validation. Here we explain the vulnerability and outline the steps we’ve taken to mitigate it. ...
January 16, 2026 2:00 PM
Astro is joining Cloudflare
The Astro Technology Company team — the creators of the Astro web framework — is joining Cloudflare. We’re doubling down on making Astro the best framework for content-driven websites, today and in the years to come....
December 15, 2025 2:00 PM
The 2025 Cloudflare Radar Year in Review: The rise of AI, post-quantum, and record-breaking DDoS attacks
We present our 6th annual review of Internet trends and patterns observed across the globe, revealing the disruptions, advances and metrics that defined 2025. ...
November 05, 2025 2:00 PM
How Workers VPC Services connects to your regional private networks from anywhere in the world
Workers VPC Services enter open beta today. We look under the hood to see how Workers VPC connects your globally-deployed Workers to your regional private networks by using Cloudflare's global network, while abstracting cross-cloud networking complexity....
October 29, 2025 1:00 PM
One IP address, many users: detecting CGNAT to reduce collateral effects
IPv4 scarcity drives widespread use of Carrier-Grade Network Address Translation, a practice in ISPs and mobile networks that places many users behind each IP address, along with their collected activity and volumes of traffic. We introduce the method we’ve developed to detect la...
October 29, 2025 1:00 PM
Defending QUIC from acknowledgement-based DDoS attacks
We identified and patched two DDoS vulnerabilities in our QUIC implementation related to packet acknowledgements. Cloudflare customers were not affected. We examine the "Optimistic ACK" attack vector and our solution, which dynamically skips packet numbers to validate client beha...
October 28, 2025 1:00 PM
Keeping the Internet fast and secure: introducing Merkle Tree Certificates
Cloudflare is launching an experiment with Chrome to evaluate fast, scalable, and quantum-ready Merkle Tree Certificates, all without degrading performance or changing WebPKI trust relationships....
October 16, 2025 2:00 PM
Improving the trustworthiness of Javascript on the Web
There's no way to audit a site’s client-side code as it changes, making it hard to trust sites that use cryptography. We preview a specification we co-authored that adds auditability to the web....
September 29, 2025 2:00 PM
15 years of helping build a better Internet: a look back at Birthday Week 2025
Rust-powered core systems, post-quantum upgrades, developer access for students, PlanetScale integration, open-source partnerships, and our biggest internship program ever — 1,111 interns in 2026....
September 25, 2025 2:00 PM
Safe in the sandbox: security hardening for Cloudflare Workers
We are further hardening Cloudflare Workers with the latest software and hardware features. We use defense-in-depth, including V8 sandboxes and the CPU's memory protection keys to keep your data safe....