About “Polygraphia”
Polygraphia is a cryptographic work written by Johannes Trithemius and published in 1518. It is dedicated to the art of steganography, which involves concealing messages within other forms of communication. The book explores methods for hiding information, often using seemingly innocent texts or symbols to convey secret messages. Trithemius was a German abbot and scholar known for his contributions to cryptography and secret writing. Polygraphia is considered one of the earliest works on steganography and remains an important text in the history of cryptography. (Summary adapted from Wikipedia, CC BY-SA 4.0.)
Some summaries adapted from Wikipedia, CC BY-SA 4.0.