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> I'm also not sure I'd say the security community as a whole feels that cryptographic agility is an anti-pattern, there are plenty of vocal voices on all sides of that argument. I personally agree that you gain very little from cryptographic agility but have to pay a fair amount, but I don't think it's as settled as you make it out to be.

I totally agree with this assessment, and rereading my comment, I say that as though it’s a lot more settled than it is.

I think it’s probably harmless to tag those sorts of bits of data, but also JWT has shown us that having that metadata in band does lead to people using it for those kinds of decisions whether they’re supposed to or not.



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