1562: Death of Johannes Trithemius
The major works of Trithemius include "Steganographia," (which means in Greek, "hidden writing") written circa 1499, "Polygraphiae," a cryptographic work, and "De Septum Secundeis," a history of the World based on astrology.
Trithemius was also a magician. In his trilogy -"Steganographia," books one and two were clearly systems for encoding and were the first books written on cryptography. The third book in the trilogy was more buried in the guise of occult astrology. Many took the writing literally and thought the numbers contained secrets to conjuring spirits. Scholars, however, went further and discovered the writing contained a code and began working to decipher it. The messages encrypted in Trithemius's tables turned out to be somewhat ordinary sentences.