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(Paraphrased from Wicked / @w_s_bitcoin) seed entropy analogy: True seed entropy is like trying to pick a single atom somewhere in the entire universe. What happened with the Coldcard Mk3 is that they were effectively generating seeds from an atom inside a single drop of water. Moving up to the Mk4, Mk5, and Coldcard Q improved things — now it’s more like picking an atom from a bucket of water instead of a drop. Adding a second secure element gives a bit more entropy, but you’re still choosing from a relatively small, searchable pool. The bucket is bigger than the drop, but it’s still not the universe.
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