No, not really. If the data you hold is precious enough that you may have an actor with near infinite resources after you then you don't wait for proof to arrive, you assume the holes are there and act accordingly. Paranoia is fine if you have actual enemies, banking on the theory that evidence that a backdoor exists in a tool that you are using today will never surface is entirely the wrong approach.
Knowledge that this environment exists is also strong evidence that it was a backdoor.
If you propose a clearly questionable security practice in some arbitrary bureaucracy, the assumption is it's incompetence because that happens all the time and no one detects it until it's already in production.
If you propose a clearly questionable security practice to a cryptography standards body, the expectation is that you get laughed out of the room. Even the possibility of a backdoor would make everyone skeptical, which would be useless in a standard because no one would trust it.
And yet it made it through the standards process for some reason, but there is only one plausible reason.
> In this way, entire sections of industry will auto-assume the backdoor was both deliberate, and used both both friendlies & hostiles.
That’s fine. But they should be equally paranoid of all substitute products/services that use other recommendations from NIST, right? Are there greater than zero products on the (US) market with no encryption in the system recommended by NIST?
Also, I don’t think I was limiting my thinking to a customer of the weak encryption product. I was also thinking through the lens of legal implications.
People who live in an evidence-based rational world don’t skip the evidence step and go straight to possibilities and counterfactuals.