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Computing Euclidean distance on 144 dimensions

Late last year I read a blog post about our CSAM image scanning tool. I remember thinking: this is so cool! Image processing is always hard, and deploying a real image identification system at Cloudflare is no small achievement!Some time later, I was chatting with Kornel: “We have all the pieces in the image processing…

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A quirk in the SUNBURST DGA algorithm

On Wednesday, December 16, the RedDrip Team from QiAnXin Technology released their discoveries (tweet, github) regarding the random subdomains associated with the SUNBURST malware which was present in the SolarWinds Orion compromise. In studying queries performed by the malware, Cloudflare has uncovered additional details about how the Domain Generation Algorithm (DGA) encodes data and exfiltrates…

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Introducing Cloudflare Pages: the best way to build JAMstack websites

Across multiple cultures around the world, this time of year is a time of celebration and sharing of gifts with the people we care the most about. In that spirit, we thought we’d take this time to give back to the developer community that has been so supportive of Cloudflare for the last 10 years.Today,…

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Trend data on the SolarWinds Orion compromise

On Sunday, December 13, FireEye released a report on a sophisticated supply chain attack leveraging SolarWinds’ Orion IT monitoring software. The malware was distributed as part of regular updates to Orion and had a valid digital signature.One of the notable features of the malware is the way it hides its network traffic using a multi-staged…

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Improving Cloudflare’s products and services, one feature request at a time

I started at Cloudflare in April 2018. I was excited to join an innovative company that operates with integrity and takes customer needs into account when planning product roadmaps. After 2.5 years at Cloudflare, this excitement has only grown, as it has become even clearer that our customers’ feedback is essential to our business. At…

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Privacy and Compliance Reading List

Privacy matters. Privacy and Compliance are at the heart of Cloudflare’s products and solutions. We are committed to providing built-in data protection and privacy throughout our global network and for every product in our portfolio. This is why we have dedicated a whole week to highlight important aspects of how we are working to make…

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Supporting Jurisdictional Restrictions for Durable Objects

Over the past week, you’ve heard how Cloudflare is making it easy for our customers to control where their data is stored and protected.We’re not the only ones building these data controls. Around the world, companies are working to figure out where and how to store customer data in a way that is compliant with…

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Encrypting your WAF Payloads with Hybrid Public Key Encryption (HPKE)

The Cloudflare Web Application Firewall (WAF) blocks more than 72B malicious requests per day from reaching our customers’ applications. Typically, our users can easily confirm these requests were not legitimate by checking the URL, the query parameters, or other metadata that Cloudflare provides as part of the security event log in the dashboard.Sometimes investigating a…

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