The Alberti Cipher was one of the first polyalphabetic ciphers.Created in the 15th century (1466/67), it was the peak of cryptography at that time. Its inventor was Leon Battista Alberti, an illegitimate son of an Italian nobleman.He was also interested in painting and writing, though he is probably best known for his architecture. He created the cipher after a conversation on the art of print with Leonardo Dati in the gardens of the Vatican.