They quote three papers that supposedly make the mistake of using Shannon entropy to reason about secrets. They all seem to relate to the same algorithm, so it

They quote three papers that supposedly make the mistake of using Shannon entropy to reason about secrets. They all seem to relate to the same algorithm, so it sounds to me (and our local crypto guy) more likely that there's one particular field that is making this mistake, but it's not a common mistake in crypto. In my understanding Shannon entropy is not very useful for crypto reasoning for more trivial reasons. A password that has a half chance of being "foo", and half chance of being completely random has good Shannon entropy, but it's clearly not a good password.