San Francisco
Nick Sullivan was Head of Research (& Cryptography) at Cloudflare until 2023. He is passionate about improving security and privacy through cutting-edge research and the development of open standards.
07/03/2017
Everybody has secrets. Software developers have many. Often these secrets—API tokens, TLS private keys, database passwords, SSH keys, and other sensitive data—are needed to make a service run properly and interact securely with other services. ...
03/15/2017
Cloudflare’s mission is to help build a faster and more secure Internet. Over the last several years, the Internet Engineering Task Force (IETF) has been working on a new version of TLS, the protocol that powers the secure web....
02/07/2017
Come join us on Cloudflare HQ in San Francisco on Tuesday, Febrary 28, 2017 for another cryptography meetup. We again had a great time at the last one, we decided to host another. It's becoming a pattern....
11/02/2016
Come join us on Cloudflare HQ in San Francisco on Tuesday, November 22 for another cryptography meetup. We had such a great time at the last one, we decided to host another....
09/21/2016
Encrypting the web is not an easy task. Various complexities prevent websites from migrating from HTTP to HTTPS, including mixed content, which can prevent sites from functioning with HTTPS. ...
09/20/2016
The encrypted Internet is about to become a whole lot snappier. When it comes to browsing, we’ve been driving around in a beat-up car from the 90s for a while. Little does anyone know, we’re all about to trade in our station wagons for a smoking new sports car. ...
09/20/2016
Since CloudFlare’s inception, we have worked tirelessly to make encryption as simple and as accessible as possible. Over the last two years, we’ve made CloudFlare the easiest way to enable encryption for web properties and internet services. ...
05/10/2016
At CloudFlare we strive to combine features that are simple, secure, and backed by solid technology. The Origin CA is a great example of this. You no longer need to go to a third-party certificate authority to protect the connection between CloudFlare and your origin server....
04/08/2016
Now back in HD: the CloudFlare Cryptography Meetup series. A while back, CloudFlare hosted a pair of Meetups focused on encryption and cryptographic technology. ...
03/31/2016
Continuing our commitment to high quality open-source software, we’re happy to announce release 1.2 of CFSSL, our TLS/PKI Swiss Army knife. We haven’t written much about CFSSL here since we originally open sourced the project in 2014, so we thought we’d provide an update....
03/28/2016
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!...
02/12/2016
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. ...
01/21/2016
The web is an collaborative ecosystem. Web standards exist to ensure that participants of the network behave in a predictable way....
12/22/2015
It’s well known that SHA-1 is no longer considered a secure cryptographic hash function. Researchers now believe that finding a hash collision (two values that result in the same value when SHA-1 is applied) is inevitable and likely to happen....
06/24/2015
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. ...
06/11/2015
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. ...
04/30/2015
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....
02/24/2015
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....
02/23/2015
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....
