Killing RC4: The Long Goodbye
May 07, 2014 4:00 AM
At CloudFlare we spend a lot of time thinking about the best way to keep our customers’ data safe. Despite recent troubles, HTTPS is still the best way to deliver encrypted content for the web. ...
Searching for The Prime Suspect: How Heartbleed Leaked Private Keys
April 27, 2014 10:00 PM
Within a few hours of CloudFlare launching its Heartbleed Challenge the truth was out. Not only did Heartbleed leak private session information (such as cookies and other data that SSL should have been protecting), but the crown jewels of an HTTPS web server were also vulnerable....
The Hidden Costs of Heartbleed
April 17, 2014 10:00 AM
A quick followup to our last blog post on our decision to reissue and revoke all of CloudFlare's customers' SSL certificates. One question we've received is why we didn't just reissue and revoke all SSL certificates as soon as we got word about the Heartbleed vulnerability?...
The Heartbleed Aftermath: all CloudFlare certificates revoked and reissued
April 17, 2014 12:44 AM
Eleven days ago the Heartbleed vulnerability was publicly announced. Last Friday, we issued the CloudFlare Challenge: Heartbleed and simultaneously started the process of revoking and reissuing all the SSL certificates....
Certificate Revocation and Heartbleed
April 12, 2014 9:52 AM
As you may have noticed, the CloudFlare Heartbleed Challenge has been solved. The private key for the site cloudflarechallenge.com has been obtained by several authorized attackers via the Heartbleed exploit....
MORE POSTS
March 11, 2014 5:00 PM
The Web's Silver Jubilee
No matter what your age, it's hard to believe that the World-Wide Web is 25 today. For the young the web has always been part of their lives, for the older it seems like it was invented only yesterday....
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March 10, 2014 4:30 PM
ECDSA: The digital signature algorithm of a better internet
This blog post is dedicated to the memory of Dr. Scott Vanstone, popularizer of elliptic curve cryptography and inventor of the ECDSA algorithm. He passed away on March 2, 2014....
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February 14, 2014 1:00 AM
Introducing Strict SSL: Protecting Against a On-Path Attack on Origin Traffic
At CloudFlare, we are always looking for ways to improve the security of our customers’ websites. One of the features we provide is the ability to serve their website encrypted over SSL/TLS. ...
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December 26, 2013 5:00 PM
Using CloudFlare to mix domain sharding and SPDY
It’s common knowledge that domain sharding, where the resources in a web page are shared across different domains (or subdomains), is a good thing. ...
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November 21, 2013 9:00 AM
Red October: CloudFlare’s Open Source Implementation of the Two-Man Rule
At CloudFlare, we are always looking for better ways to secure the data we’re entrusted with. This means hardening our system against outside threats such as hackers, but it also means protecting against insider threats. ...
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October 24, 2013 3:00 AM
A (Relatively Easy To Understand) Primer on Elliptic Curve Cryptography
Elliptic Curve Cryptography (ECC) is one of the most powerful but least understood types of cryptography in wide use today. At CloudFlare, we make extensive use of ECC to secure everything from our customers' HTTPS connections to how we pass data between our data centers....
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July 11, 2013 11:02 PM
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....
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February 04, 2013 2:26 PM
New "Lucky Thirteen" SSL Vulnerabilities: CloudFlare Users Protected
CloudFlare often gets early word of new vulnerabilities before they are released. Last week we got word that today (Monday, February 4, 2013) there would be a new SSL vulnerability announced. ...
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December 11, 2012 5:24 PM
What We Just Did to Make SSL Even Faster
A little over a month ago, we published a couple of blog posts about how we were making SSL faster. Specifically, we enabled OCSP stapling across our network....
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November 28, 2012 8:21 PM
Choosing a Two-Factor Authentication System
We've been thinking about how to best implement two-factor authentication to better protect our customers' accounts for quite some time now. When, about 6 months ago, my account was targeted by hackers the importance of a good account security became clear. ...
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November 28, 2012 5:05 PM
Two-factor Authentication Now Available
With web performance and security being the core of CloudFlare, we are always looking for ways to improve not just our customers' website security, but their account security as well. Therefore, we are excited to now offer two-factor authentication for all CloudFlare accounts....
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June 29, 2012 2:15 AM
How to make SSL fast
HTTP, the protocol of the web, is unencrypted by default. That means it is trivial for someone using the same local network as you to spy on all the data you send to and receive from most websites. ...
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June 15, 2012 9:43 AM
Introducing SPDY
In 2009, Google began work on a new network protocol to make web pages faster. Dubbed SPDY (pronounced "speedy"), the protocol is designed to solve many of the bottlenecks that slow HTTP down. Beginning today, we're rolling out a beta of SPDY to CloudFlare customers. ...
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June 01, 2012 11:55 PM
Taming BEAST: Faster, Safer SSL now on CloudFlare
For some time, the vast majority of the web has been vulnerable to the so-called BEAST SSL attack. The attack was first demonstrated in 2011, and more than 90% of the Internet including large sites like Google.com remain vulnerable to their SSL sessions being decrypted....
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