Answer
Alberti's cryptographic foundation was shared with Johannes Trithemius. Alberti was an Italian polymath and the inventor of several ciphers, including the Alberti cipher, which is one of the earliest known polyalphabetic substitution ciphers. Trithemius was a German Benedictine monk, scholar, and cryptographer. He is best known for his work on cryptography, including his book Steganographia, which is one of the earliest known treatises on cryptography.