{"version":"1.0","type":"link","title":"Two-square cipher - Newikis","description":"The Two-square cipher, also called double Playfair, is a manual symmetric encryption technique. It was developed to ease the cumbersome nature of the large encryption/decryption matrix used in the four-square cipher while still being slightly stronger than the single-square Playfair cipher.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}