Performing & Preventing SSL Stripping: A Plain-English Primer
October 20, 2017 4:23 PM
Over the past few days we learned about a new attack that posed a serious weakness in the encryption protocol used to secure all modern Wi-Fi networks....
Introducing the Cloudflare Geo Key Manager
September 26, 2017 1:00 PM
Cloudflare’s customers recognize that they need to protect the confidentiality and integrity of communications with their web visitors....
Understanding the prevalence of web traffic interception
September 12, 2017 4:29 PM
This post summarizes how prevalent encrypted web traffic interception is and how it negatively affects online security according to a study published at NDSS 2017 authored by several researchers including the author of this post and Nick Sullivan of Cloudflare. ...
SIDH in Go for quantum-resistant TLS 1.3
September 01, 2017 8:48 PM
Most of today's cryptography is designed to be secure against an adversary with enormous amounts of computational power. This means estimating how much work certain computations require, and choosing cryptographic parameters based on our best estimates....
How to use Cloudflare for Service Discovery
July 21, 2017 8:01 AM
Cloudflare runs 3,588 containers, making up 1,264 apps and services that all need to be able to find and discover each other in order to communicate -- a problem solved with service discovery....
MORE POSTS
July 03, 2017 4:21 PM
A container identity bootstrapping tool
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. ...
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May 02, 2017 1:00 PM
IoT Security Anti-Patterns
From security cameras to traffic lights, an increasing amount of appliances we interact with on a daily basis are internet connected. A device can be considered IoT-enabled when the functionality offered by its Embedded System is exposed through an internet connected API....
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May 01, 2017 3:58 PM
Introducing TLS with Client Authentication
In a traditional TLS handshake, the client authenticates the server, and the server doesn’t know too much about the client. However, starting now, Cloudflare is offering enterprise customers TLS with client authentication. ...
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March 15, 2017 2:00 PM
Introducing Zero Round Trip Time Resumption (0-RTT)
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....
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February 01, 2017 2:57 PM
TLS 1.3 explained by the Cloudflare Crypto Team at 33c3
Nick Sullivan and I gave a talk about TLS 1.3 at 33c3, the latest Chaos Communication Congress. The congress, attended by more that 13,000 hackers in Hamburg, has been one of the hallmark events of the security community for more than 30 years....
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December 30, 2016 2:34 PM
2017 and the Internet: our predictions
Looking back over 2016, we saw the good and bad that comes with widespread use and abuse of the Internet. ...
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December 26, 2016 2:59 PM
So you want to expose Go on the Internet
Back when crypto/tls was slow and net/http young, the general wisdom was to always put Go servers behind a reverse proxy like NGINX. That's not necessary anymore!...
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December 05, 2016 1:54 PM
TLD glue sticks around too long
Recent headline grabbing DDoS attacks provoked heated debates in the DNS community. Everyone has strong opinions on how to harden DNS to avoid downtime in the future. Is it better to use a single DNS provider or multiple? ...
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November 28, 2016 2:10 PM
HPACK: the silent killer (feature) of HTTP/2
If you have experienced HTTP/2 for yourself, you are probably aware of the visible performance gains possible with HTTP/2 due to features like stream multiplexing, explicit stream dependencies, and Server Push. ...
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November 02, 2016 11:45 PM
Cloudflare Crypto Meetup #4: November 22
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....
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October 12, 2016 3:05 PM
TLS nonce-nse
One of the base principles of cryptography is that you can't just encrypt multiple messages with the same key. At the very least, what will happen is that two messages that have identical plaintext will also have identical ciphertext, which is a dangerous leak. ...
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September 23, 2016 4:01 PM
An overview of TLS 1.3 and Q&A
The CloudFlare London office hosts weekly internal Tech Talks (with free lunch picked by the speaker). My recent one was an explanation of the latest version of TLS, 1.3, how it works and why it's faster and safer....
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September 21, 2016 3:51 PM
Opportunistic Encryption: Bringing HTTP/2 to the unencrypted web
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. ...
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September 20, 2016 1:04 PM
Introducing TLS 1.3
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. ...
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