Thanks for that! The analysis you present doesn’t seem to account for the Jokers having variable values based on information only you and the receiver have predetermined, which is what I would propose to help solitaire be more secure. Also, a non-standard deck would help, such as a tarot deck.

I recommend the solitaire cipher.

The pesky first amendment only applies where VP Krasnov says it does, comrade. Rules for thee, not for he.