this post was submitted on 09 Sep 2025
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What if they just do MITM with a Trusted root? Does HSTS provide a method to do cert pinning?
HSTS just enforces HTTPS over HTTP.
I seriously doubt Chrome or Firefox would ever be coerced into trusting a cert like that. If they did then you would see a very rapid shift away from those browsers to one or more of the open source alternatives.
And any CA that issued such a cert that allowed for wholesale MITM access like that would be blacklisted by all the browsers very quickly as well. That would put the CA out of business very quickly.