Transport Layer Security (TLS) 1.3 is now enabled by default on new Windows 10 Insider Preview builds.

Taking Transport Layer Security (TLS) to the next level with TLS 1.3

Transport Layer Security (TLS) 1.3 is now enabled by default on Windows 10 Insider Preview builds, starting with Build 20170, the first step in a broader rollout to Windows 10 systems. TLS 1.3 is the latest version of the internet’s most deployed security protocol, which encrypts data to provide a secure communication channel between two endpoints. TLS 1.3 eliminates obsolete cryptographic algorithms, enhances security over older versions, and aims to encrypt as much of the handshake as possible.

Taking Transport Layer Security (TLS) to the next level with TLS 1.3 - Microsoft Security