Answer
Johannes Trithemius is considered one of the founders of Western cryptography. He was a German monk, scholar, and occultist who lived from 1462 to 1516. Trithemius wrote extensively on cryptography, including the book "Polygraphia", which is considered one of the first systematic treatises on the subject. Trithemius' work was influential on later cryptographers, such as Leon Battista Alberti, who is also considered one of the founders of Western cryptography.