this post was submitted on 07 Aug 2024
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You can't forge a root CA, unless you've found a way to break RSA or trick users into installing your malicious CA. The entire chain needs to be valid for browsers to accept it, all the way up to a root that the browser trusts. It's impossible for a CA to sign a cert but also not make it traceable to them.
If RSA gets broken, the entirety of Internet security would fall apart and the entire Internet would explode into complete chaos. Every SSH server would suddenly be broken wide open. All VPNs would be useless. Tor would be useless.
Which is why we have somewhat moved to quantum resistant crypto with elliptic curves to replace RSA, well before we actually manage to break RSA.
Right. I forgot that browsers have the roots built in. Thanks!