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. Last September, Cloudflare was the first service provider to enable people to use this new version of the protocol, TLS 1.3, improving security and performance for millions of customers.
Today we are introducing another performance-enhancing feature: zero round trip time resumption, abbreviated as 0-RTT. About 60% of the connections we see are from people who are visiting a site for the first time or revisiting after an extended period of time. TLS 1.3 speeds up these connections significantly. The remaining 40% of connections are from visitors who have recently visited a site and are resuming a previous connection. For these resumed connections, standard TLS 1.3 is safer but no faster than any previous version of TLS. 0-RTT changes this. It dramatically speeds up resumed connections, leading to a faster and smoother web experience for web sites that you visit regularly. This speed boost is especially noticeable on mobile networks.
We’re happy to announce that 0-RTT is Continue reading
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