Internet Engineering Task Force (IETF) A. Popov Request for Comments: 7465 Microsoft Corp. Updates: 5246, 4346, 2246 February 2015 Category: Standards Track ISSN: 2070-1721 Prohibiting RC4 Cipher Suites Abstract This document requires that Transport Layer Security (TLS) clients and servers never negotiate the use of RC4 cipher suites when they establish connections. This applies to all TLS version