So, then 275? With the both the top and bottom card face down? That's going in my next spy novel. Spy 1 gets together with Spy 2, for cracking game of Cribbage

So, then 275? With the both the top and bottom card face down? That's going in my next spy novel. Spy 1 gets together with Spy 2, for cracking game of Cribbage, and at the end, Spy 2 walks out with a deck of cards, but it's actually a 256 bit encryption key.