https://app.knowbase.one/vault/rfc/docid/7099
RFC6520: Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS) Heartbeat Extension
Internet Engineering Task Force (IETF) R. Seggelmann Request for Comments: 6520 M. Tuexen Category: Standards Track Muenster Univ. of Appl. Sciences ISSN: 2070-1721 M. Williams ...