lol in what way am I being hand wavy? It was a sincere question, and the use case you're pointing to is very different than what the post was discussing That b

lol in what way am I being hand wavy? It was a sincere question, and the use case you're pointing to is very different than what the post was discussing That being said, for these cases you could use Argon2 which is mostly (entirely?) based on ARX constructs and will work well on embedded/underpowered devices There are also some symmetric encryption shenanigans that can be done, but if you can use something other than password-based auth you're free from pretty much all of these problems, with probably much better security