Staying afloat: the DROWN Attack and CloudFlare
March 01, 2016
CloudFlare customers are automatically protected against the recently disclosed DROWN Attack. We do not have SSLv2 enabled on our servers....
Padding oracles and the decline of CBC-mode cipher suites
February 12, 2016
At CloudFlare, we’re committed to making sure the encrypted web is available to everyone, even those with older browsers. At the same time, we want to make sure that as many people as possible are using the most modern and secure encryption available to them. ...
Change the (S)Channel! Deconstructing the Microsoft TLS Session Resumption bug
February 11, 2016
Several months ago we started hearing occasional reports from .NET developers that they were having trouble maintaining HTTPS sessions with one of our customer’s websites. ...
How to Talk to Your Parents About Encryption
December 25, 2015
It’s December 25th, which means most of you are probably at home visiting with family. I asked a few of the security engineers here at CloudFlare how they explain their jobs when they’re home for the holidays, and here's what they had to say....
SHA-1 Deprecation: No Browser Left Behind
December 09, 2015
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. ...
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September 16, 2015
Cloudflare + WHMCS: faster websites for your customers
We’re at the cPanel Conference in Denver this week, so feel free to drop by our booth and say hello. It’s a great opportunity to connect with our partners and better understand their needs....
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June 24, 2015
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. ...
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June 11, 2015
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 WWDC, where thousands of Apple developers come to San Francisco to talk, learn and share best practices for developing software for Apple platforms....
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May 20, 2015
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. ...
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May 07, 2015
Go crypto: bridging the performance gap
It is no secret that we at CloudFlare love Go. We use it, and we use it a LOT. There are many things to love about Go, but what I personally find appealing is the ability to write assembly code!...
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April 30, 2015
An introduction to JavaScript-based DDoS
CloudFlare protects millions of websites from online threats. One of the oldest and most pervasive attacks launched against websites is the Distributed Denial of Service (DDoS) attack....
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April 29, 2015
Introducing Multi-User Organizations: Share An Account Without Sharing A Login
An enterprise needs security and controls around access. Your web developer needs to update your website’s logo and make sure it’s live immediately, but doesn’t need access to your SSL keys. ...
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April 21, 2015
Contributing back to the security community
This Friday at the RSA Conference in San Francisco, along with Marc Rogers, Principal Security Researcher at CloudFlare, I'm speaking about a version of The Grugq's PORTAL, an open source network security device designed to make life easier and safer....
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February 27, 2015
Protecting web origins with Authenticated Origin Pulls
As we have been discussing this week, securing the connection between CloudFlare and the origin server is arguably just as important as securing the connection between end users and CloudFlare. ...
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February 26, 2015
Enforce Web Policy with HTTP Strict Transport Security (HSTS)
HTTP Strict Transport Security (HSTS, RFC 6797) is a web security policy technology designed to help secure HTTPS web servers against downgrade attacks....
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February 24, 2015
Universal SSL: Encryption all the way to the origin, for free
Last September, CloudFlare unveiled Universal SSL, enabling HTTPS support for all sites by default. All sites using CloudFlare now support strong cryptography from the browser to CloudFlare’s servers....
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February 24, 2015
TLS Session Resumption: Full-speed and Secure
At CloudFlare, making web sites faster and safer at scale is always a driving force for innovation. We introduced “Universal SSL” to dramatically increase the size of the encrypted web....
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February 23, 2015
Do the ChaCha: better mobile performance with cryptography
CloudFlare is always trying to improve customer experience by adopting the latest and best web technologies so that our customers (and their visitors) have a fast and a secure web browsing experience....
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February 23, 2015
End of the road for RC4
Today, we completely disabled the RC4 encryption algorithm for all SSL/TLS connections to CloudFlare sites. It's no longer possible to connect to any site that uses CloudFlare using RC4....
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