The Transport Layer Security Protocol Version 1.3 (RFC 8446) (source code)

= The Transport Layer Security Protocol Version 1.3 (RFC 8446)
{c}
{title2=August 2018}

Standards-track <TLS> 1.3 specification; section 1 defines channel security between peers.

https://www.rfc-editor.org/rfc/rfc8446.html