Recently Mozilla has disabled the now so-called protocol dance, which makes adding another workaround (SCSV) pretty much obsolete: https://bugzilla.mozilla.org/show_bug.cgi?id=1084025#c7 And a few days ago mozilla dev Brian Smith tweetet this: "Fx experiment to disable non-secure TLS version fallback is going even better than expected. Starting to feel silly for delaying it so long." https://twitter.com/BRIAN_____/status/555138042428526593 I think this adds further evidence that adding another workaround layer (SCSV) is the wrong thing to do. Instead browsers should just stop doing weird things with protocols that compromise security and drop the protocol dance completely. (By the way: Has anyone thought what happens when people implement TLS hardware that is version intolerant to versions > 1.2 and at the same time send SCSV in the handshake? I'm pretty sure that at some point some hardware will appear that does exactly that. Will we need another SCSV standard for every TLS version then?) -- Hanno Böck http://hboeck.de/ mail/jabber: hanno@xxxxxxxxx GPG: BBB51E42
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