https://app.kbone.net/vault/rfc/docid/8156
RFC7507: TLS Fallback Signaling Cipher Suite Value (SCSV) for Preventing Protocol Downgrade Attacks
Internet Engineering Task Force (IETF) B. Moeller Request for Comments: 7507 A. Langley Updates: 2246, 4346, 4347, 5246, 6347 Google Category: Standards Track April 2015 IS...