of Cipher
Source: Webster's dictionaryBoyer showed that Egyptians created the first ciphered numeral system. Source: Internet
In 1863, Friedrich Kasiski published a method (probably discovered secretly and independently before the Crimean War by Charles Babbage ) which enabled the calculation of the length of the keyword in a Vigenère ciphered message. Source: Internet
This is a story of buried treasure that was described in 1819–21 by use of a ciphered text that was keyed to the Declaration of Independence. Source: Internet