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1400s (15th century) Voynich Manuscript: Unsolved 1500s (16th century) (?) Rohonc Codex: Unsolved 1586 Babington Plot ciphers Solved 17th century Great Cipher: Solved 1730 Olivier Levasseur's treasure cryptogram Unsolved 1760–1780 Copiale cipher: Solved in 2011 1843 "The Gold-Bug" cryptogram by Edgar Allan Poe: Solved (solution given within ...
Charles Babbage, UK, 19th century mathematician who, about the time of the Crimean War, secretly developed an effective attack against polyalphabetic substitution ciphers. Leone Battista Alberti , polymath /universal genius , inventor of polyalphabetic substitution (more specifically, the Alberti cipher ), and what may have been the first ...
The Great Cipher (French: Grand chiffre) was a nomenclator cipher developed by the Rossignols, several generations of whom served the French monarchs as cryptographers.The Great Cipher was so named because of its excellence and because it was reputed to be unbreakable.
The Cardan grille was invented as a method of secret writing. The word cryptography became the more familiar term for secret communications from the middle of the 17th century. Earlier, the word steganography was common.
The squared circle: an alchemical symbol (17th century) illustrating the interplay of the four elements of matter symbolising the philosopher's stone. Antimony ♁ (in Newton), also ; Arsenic 🜺 Bismuth ♆ (in Newton), 🜘 (in Bergman) Cobalt (approximately 🜶) (in Bergman) Manganese (in Bergman)
In the early 20th century, the invention of complex mechanical and electromechanical machines, such as the Enigma rotor machine, provided more sophisticated and efficient means of encryption; and the subsequent introduction of electronics and computing has allowed elaborate schemes of still greater complexity, most of which are entirely ...
By the 17th century, when those buried in the crypt would have lived, Milan (then a possession of Spain) was a major importer of exotic plants, especially from the Americas, so cocaine could’ve ...
Image of Bacon's cipher. Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. [1] [2] [3] In steganograhy, a message is concealed in the presentation of text, rather than its content.