Posts by Nick Sullivan

Why TLS 1.3 isn't in browsers yet

Published on by Nick Sullivan.

Upgrading a security protocol in an ecosystem as complex as the Internet is difficult. You need to update clients and servers and make sure everything in between continues to work correctly. The Internet is in the middle of such an upgrade right now. Transport Layer Security (TLS), the protocol that

Cloudflare supports Privacy Pass

Published on by Nick Sullivan.

Enabling anonymous access to the web with privacy-preserving cryptography Cloudflare supports Privacy Pass, a recently-announced privacy-preserving protocol developed in collaboration with researchers from Royal Holloway and the University of Waterloo. Privacy Pass leverages an idea from cryptography — zero-knowledge proofs — to let users prove their identity across multiple sites anonymously without

Geo Key Manager: How It Works

Published on by Nick Sullivan.

Today we announced Geo Key Manager, a feature that gives customers unprecedented control over where their private keys are stored when uploaded to Cloudflare. This feature builds on a previous Cloudflare innovation called Keyless SSL and a novel cryptographic access control mechanism based on both identity-based encryption and broadcast encryption.

High-reliability OCSP stapling and why it matters

Published on by Nick Sullivan.

At Cloudflare our focus is making the internet faster and more secure. Today we are announcing a new enhancement to our HTTPS service: High-Reliability OCSP stapling. This feature is a step towards enabling an important security feature on the web: certificate revocation checking. Reliable OCSP stapling also improves connection times

How to make your site HTTPS-only

Published on by Nick Sullivan.

The Internet is getting more secure every day as people enable HTTPS, the secure version of HTTP, on their sites and services. Last year, Mozilla reported that the percentage of requests made by Firefox using encrypted HTTPS passed 50% for the first time. HTTPS has numerous benefits that are not