Thanks to @gamehawk's post here I found some nice links on diceware and passphrases:
- EFF's dice passphrases page is great and clear: https://www.eff.org/dice
- The Diceware FAQ, especially the "how long" part, are very interesting http://world.std.com/%7Ereinhold/dicewarefaq.html#howlong
#contextpatrol https://mastodon.social/@gamehawk/99933096559696045
@cwebber seems like.a different ranbowtable problem
@b the math for that is factored in, see http://world.std.com/~reinhold/dicewarefaq.html