I would suggest 50+ 6-sided dice rolls, giving about 128 bits of entropy.  Compared to a shuffle, it's easier to be sure that you got the right amount of entropy, even if the dice are somewhat biased.


On Mon, Feb 4, 2019 at 2:33 PM James MacWhyte via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:

James


On Sun, Feb 3, 2019 at 10:27 AM Ryan Havar via bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org> wrote:
Conveniently a shuffled deck of cards also can serve as a physical backup which is easy to hide in plain sight with great plausible deniability.

To make sure someone doesn't play with your cards and mix up the order, use a permanent marker to draw a diagonal line on the side of the deck from corner to corner. If the cards ever get mixed up, you can put them back in order by making sure the diagonal line matches up. 
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