4 ms·

This reminds me of Pontifex, the playing card based cipher designed by Bruce Schneier for Neal Stephenson's Cryptonomicon. https://www.schneier.com/academic/so

• flockonus 3y ago
  Author draws a comparison right in the front page: > My method stores data within a deck of cards, whilst his uses the deck as a key to encrypt data kept elsewhere. His method is more useful if you want to encrypt a lot of data, while mine could be more useful if you want to smuggle a shorter hidden message without any possibility of detection