Ericsson Ericsson This document specifies the use of EAP-TLS with TLS 1.3 while remaining backwards compatible with existing implementations of EAP- TLS. TLS 1.3 provides significantly improved security, privacy, and reduced latency when compared to earlier versions of TLS. EAP-TLS with TLS 1.3 further improves security and privacy by mandating use of privacy and revocation checking. This document also provides guidance on authorization and resumption for EAP-TLS in general (regardless of the underlying TLS version used). This document updates RFC 5216.