Even faster connection establishment with QUIC 0-RTT resumption

What this post added

This post introduces the concept of 0-RTT connection resumption for TLS 1.3 and QUIC, highlighting its potential for faster connection establishment by allowing application data to be sent before the handshake is complete. It details the associated risks, particularly replay attacks on non-idempotent requests, and explains Cloudflare's mitigation strategies, including rejecting certain request types and using the 'Early-Data: 1' header to signal origins. The post also announces the availability of a toggle on the Cloudflare dashboard to enable this feature.