That's true, but you have to admit if httponly was as invasive a change as token binding, it probably wouldn't exist?
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your point is taken. But given that it's optional and only used when negotiated by both parties in the TLS handshake, it doesn't seem that invasive to me.
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The argument I heard was that because this will break Antivirus (I'm the last person who would complain about that), they will just start being more invasive with hooks and patching. That's pretty convincing argument, bluecoat aren't just going to close down the business
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I took it the other way, IMO, someone at MSFT mentioned it as another way to get endpoint TLS MitM further untenable
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Replying to @SwiftOnSecurity @__b_c and
Right, but is that good or bad? They can switch to hooking and patching instead - they're going to do that, because they're business depends on that and they already need Admin to install cert. So did we make things better or worse?
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Replying to @taviso @SwiftOnSecurity and
If we could prevent endpoint mitm, you know I would be all for this, but aren't we just forcing them to be more sketchy?
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Replying to @taviso @SwiftOnSecurity and
It's true for regulated industries, but maybe it's time for that split. Token Binding allows for U2F tokens to be part of handshake and kills off MITM for 2FA auth, even with a good cert... But... Some industries have regulatory requirements to capture user generated content.
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Replying to @mdhardeman @SwiftOnSecurity and
I think you're saying that it will break TLS MITM middleware boxes (like bluecoat). True, but for those to work you already need Administrator access to endpoint (to install CA). If you have Admin, you can just hook and patch browser instead, which is worse!
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Replying to @taviso @mdhardeman and
So I'm saying, it doesn't make TLS MITM untenable, it forces the vendors hand to do dangerous things. Do you want more security vendors patching around in chrome.exe? If we could prevent Administrators from MitMing endpoints, you better believe I would be hassling chrome devs
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Replying to @taviso @SwiftOnSecurity and
Or.... would you choose not to if you knew it reduced market share and pushed those use cases to custom Chromium builds -- or -- *gasp* other browsers? (I don't believe that, but that's always there...)
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You got me! OK OK, you win, I'm going to talk the chrome team into shipping Safedisc with the next version and all new builds will be packed with Themida. 
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