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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 ...
The word cryptography became the more familiar term for secret communications from the middle of the 17th century. Earlier, the word steganography was common. [ citation needed ] The other general term for secret writing was cypher - also spelt cipher .
Ibn 'Adlan: 13th-century cryptographer who made important contributions on the sample size of the frequency analysis. Duke of Mantua Francesco I Gonzaga is the one who used the earliest example of homophonic Substitution cipher in early 1400s. [2] [3]
Educated men in 17th century Europe were familiar with word games in literature, including acrostics, anagrams, and ciphers. Although the original Cardan grilles were little used by the end of the 17th century, they still appeared occasionally in the form of masked letters and as literary curiosities.
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)
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.
Gravestone traditionally attributed to La Buse (Olivier Levasseur) in Saint-Paul, Réunion. Olivier Levasseur (1688, 1689, or 1690 – 7 July 1730), was a French pirate, nicknamed La Buse ("The Buzzard") or La Bouche ("The Mouth") in his early days for the speed and ruthlessness with which he always attacked his enemies as well as his ability to verbally attack his opponents.
The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.