Tag Archives: security

The View from Washington: The State of Cybersecurity

Avril Haines, Former Deputy National Security Advisor, Obama Administration Moderator: Doug Kramer, General Counsel, Cloudflare Photo by Cloudflare Staff Avril began her career on the National Security Council, and went on to become the first female deputy at the CIA. DK: How will cyber will play a role in military operations? AH: We look at […]

SIDH in Go for quantum-resistant TLS 1.3

The Quantum Threat 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 (such as factoring a number, or finding a discrete logarithm) require, and choosing cryptographic parameters based on our best estimate of how much work would be […]

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, meaning that the server additionally authenticates that the client connecting to it is authorized to connect. TLS Client Authentication is useful in cases […]

A tale of a DNS exploit: CVE-2015-7547

This post was written by Marek Vavruša and Jaime Cochran, who found out they were both independently working on the same glibc vulnerability attack vectors at 3am last Tuesday. A buffer overflow error in GNU libc DNS stub resolver code was announced last week as CVE-2015-7547. While it doesn’t have any nickname yet (last year’s […]

CloudFlare is now PCI 3.1 certified

The Payment Card Industry Data Security Standard (PCI DSS) is a global financial information security standard that keeps credit card holders safe. It ensures that any company processing credit card transactions adheres to the highest technical standards. PCI certification has several levels. Level one (the highest level) is reserved for those companies that handle the […]

DNS parser, meet Go fuzzer

Here at CloudFlare we are heavy users of the github.com/miekgs/dns Go DNS library and we make sure to contribute to its development as much as possible. Therefore when Dmitry Vyukov published go-fuzz and started to uncover tens of bugs in the Go standard library, our task was clear. Hot Fuzz Fuzzing is the technique of […]

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 […]