Cool demo, but this is only log2(43 quintillions) = 65 bit security.
Kind of related is DiceKeys, with 192 bit security: https://www.crowdsupply.com/dicekeys/dicekeys
Kind of related is DiceKeys, with 192 bit security: https://www.crowdsupply.com/dicekeys/dicekeys
I must be missing something here, there are 25 unique dice that can be permuted, each can have six potential sides showing, and 4 potential orientations of the displayed face... So (25!)×(25×6×4) ? Isn't that more like only 93 bits?
Well obviously harder to scan from a phone, I think a deck of playing cards would be easier to acquire and store. Shuffling 27 would give you 93 bits, shuffling the full 52 would be ~226.
Still, I wonder if a similar thing could be done by shuffling a deck of cards, and then riffling the results past a good camera so that an app can recognize the sequence in order. Perhaps it would be vulnerable to common shuffling mistakes?
Just because a paper is published doesn't mean it wasn't done for fun/the hell of it.