{"draft":"draft-ietf-tls-dtls-rrc-20","doc_id":"RFC9853","title":"Return Routability Check for DTLS 1.2 and 1.3","authors":["H. Tschofenig, Ed.","A. Kraus","T. Fossati"],"format":["HTML","TEXT","PDF","XML"],"page_count":"22","pub_status":"PROPOSED STANDARD","status":"PROPOSED STANDARD","source":"Transport Layer Security","abstract":"This document specifies a Return Routability Check (RRC) subprotocol\r\nfor use in the context of the Connection ID (CID) construct for the\r\nDatagram Transport Layer Security (DTLS) protocol versions 1.2 and\r\n1.3.\r\n\r\nImplementations offering the CID functionality described in RFCs 9146\r\nand 9147 are encouraged to also provide the RRC functionality\r\ndescribed in this document. For this reason, this document updates\r\nRFCs 9146 and 9147.","pub_date":"March 2026","keywords":["DTLS","RRC","CID"],"obsoletes":[],"obsoleted_by":[],"updates":["RFC9146","RFC9147"],"updated_by":[],"see_also":[],"doi":"10.17487\/RFC9853","errata_url":null}