Reply To: Let’s talk about the Playfair cipher
@upsidedown
That is truly an interesting idea and I would really love to see it become an actual cipher.
Over the past few years, I have tried and failed to come up with consistent rules for a 3D Playfair. If you have an idea on how to achieve this, please post it to your “extracurricular challenges” thread (I greatly enjoyed breaking the first three).
Ultimately, I have decided to go simple and just switch the two plaintext cards in the grid after every step. Although it feels too simple, I found that a small change in the key would produce gibberish after around 10 cards. I hope to post the ciphertext in a few days, enough to give me time to try break it myself and improve any weaknesses I find.