Advanced thematic cryptic crosswords like The Listener Crossword (published in the Saturday edition of The Times (UK) newspaper) occasionally incorporate Playfair ciphers.
cipher | Lorenz cipher | Nigel Playfair | Zero Cipher | William Playfair | Vigenère cipher | Judy Playfair | Cipher Bureau | William Henry Playfair | John Playfair | Cipher | Caesar cipher | Alberti cipher | Wadsworth's cipher | substitution cipher | Skipjack (cipher) | Pigpen cipher | Guy Lyon Playfair | Great Cipher | Crab (cipher) | Cipher in the Snow | Camellia (cipher) | Book cipher | book cipher | Blowfish (cipher) | Bacon's cipher | ADFGVX cipher |