Historical Background
Antoine Rossignol's cryptographic skills became known when in 1626 an encrypted letter was taken from a messenger leaving the city of Réalmont, controlled by the Huguenots and surrounded by the French army. The letter told that the Huguenots would not be able to hold onto the city for much longer, and by the end of the day Rossignol had successfully deciphered it. The French returned the letter with the deciphered message, forcing the Huguenots to surrender. He and his son, Bonaventure Rossignol, were soon appointed to prominent roles in the court.
Together, the two devised a code so strong it baffled cryptanalysts for centuries. Commandant Étienne Bazeries managed to break the cipher around 1893 over a period of three years, realizing that each number stood for a French syllable rather than single letters as traditional codes did. He guessed that a particular sequence of repeated numbers, 124-22-125-46-345, stood for les ennemis ("the enemies") and from that information was able to unravel the entire cipher.
Read more about this topic: Great Cipher
Famous quotes containing the words historical and/or background:
“Historical! Must it be historical to catch your attention? Even though historicity, like notoriety, denotes nothing more than that something has occurred.”
—Franz Grillparzer (1791–1872)
“I had many problems in my conduct of the office being contrasted with President Kennedy’s conduct in the office, with my manner of dealing with things and his manner, with my accent and his accent, with my background and his background. He was a great public hero, and anything I did that someone didn’t approve of, they would always feel that President Kennedy wouldn’t have done that.”
—Lyndon Baines Johnson (1908–1973)