If you’re in Buenos Aires on April 2-3 and are interested in building, come join the IETF Hackathon. CloudFlare and Mozilla will be working on TLS 1.3, the first new version of TLS in eight years! At the hackathon we’ll be focusing on implementing the latest draft of TLS 1.3 and testing interoperability between existing […]
Tag Archives: tls
TLS Certificate Optimization: The Technical Details behind “No Browser Left Behind”
Overview Back in early December we announced our “no browser left behind” initiative to the world. Since then, we have served well over 500 billion SHA-1 certificates to visitors that otherwise would not have been able to communicate securely with our customers’ sites using HTTPS. All the while, we’ve continued to present newer SHA-2 certificates […]
SHA-1 Deprecation: No Browser Left Behind
After December 31, 2015, SSL certificates that use the SHA-1 hash algorithm for their signature will be declared technology non grata on the modern Internet. Google’s Chrome browser has already begun displaying a warning for SHA-1 based certs that expire after 2015. Other browsers are mirroring Google and, over the course of 2016, will begin […]
How to build your own public key infrastructure
A major part of securing a network as geographically diverse as CloudFlare’s is protecting data as it travels between datacenters. Customer data and logs are important to protect but so is all the control data that our applications use to communicate with each other. For example, our application servers need to securely communicate with our […]
iOS Developers — Migrate to iOS 9 with CloudFlare
Thousands of developers use CloudFlare to accelerate and secure the backend of their mobile applications and websites. This week is Apple’s Worldwide Developers Conference (WWDC), where thousands of Apple developers come to San Francisco to talk, learn and share best practices for developing software for Apple platforms. New announcements from Apple this week make CloudFlare […]
Logjam: the latest TLS vulnerability explained
Yesterday, a group from INRIA, Microsoft Research, Johns Hopkins, the University of Michigan, and the University of Pennsylvania published a deep analysis of the Diffie-Hellman algorithm as used in TLS and other protocols. This analysis included a novel downgrade attack against the TLS protocol itself called Logjam, which exploits EXPORT cryptography (just like FREAK). First, […]
Staying on top of TLS attacks
CloudFlare makes extensive use of TLS connections throughout our service which makes staying on top of the latest news about security problems with TLS a priority. We use TLS both externally and internally and different uses of TLS have different constraints. Broadly there are three ways we use TLS: to handle HTTPS connections from web […]
