Steganographia (Book)
Steganographia
1499 AD - 1900 AD
STEGANOGRAPHY: That is: THE SURE ART OF DISCLOSING THE INTENTION OF ONE’S MIND TO THOSE WHO ARE ABSENT THROUGH SECRET WRITING; BY THAT MOST REVEREND AND FAMOUS MAN, Johannes Trithemius, Abbot of Sponheim, & Most Perfect Master of Natural Magic.
PREFIXED TO THIS WORK IS ITS KEY, OR a true introduction, composed by the Author himself; HERETOFORE MUCH DESIRED BY MANY, though seen by very few: But now brought into the public domain for the sake of Students of secret Philosophy. With the Privilege & consent of his superiors.
http://trithemius.com/steganographia-english/
From wikipedia
This book is in three volumes, and appears to be about magic—specifically, about using spirits to communicate over long distances. However, since the publication of a decryption key to the first two volumes in 1606, they have been known to be actually concerned with cryptography and steganography. Until recently, the third volume was widely still believed to be solely about magic, but the "magical" formulae have now been shown to be cover-texts for yet more cryptographic content.
Events (5)
for
Attachments
A chart from Trithemius' Steganographia A chart from Johannes Trithemius' Steganographia in the hand of John Dee who copied the entire manuscript in 1591
