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This software uses "A" to denote "bulls" (digit in the correct position) and "B" to denote "cows" (digit in the wrong position). Bulls and cows (also known as cows and bulls or pigs and bulls) is a code -breaking mind or paper and pencil game for two or more players. The game is played in turns by two opponents who aim to decipher the other's ...
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. The example key shows one way the letters can be assigned to the grid.
Beale ciphers. The Beale ciphers are a set of three ciphertexts, one of which allegedly states the location of a buried treasure of gold, silver and jewels estimated to be worth over 43 million US dollars as of January 2018. Comprising three ciphertexts, the first (unsolved) text describes the location, the second (solved) ciphertext accounts ...
Kryptos is a distributed sculpture by the American artist Jim Sanborn located on the grounds of the Central Intelligence Agency (CIA) headquarters, the George Bush Center for Intelligence in Langley, Virginia. [1] Since its dedication on November 3, 1990, there has been much speculation about the meaning of the four encrypted messages it bears. Of these four messages, the first three have been ...
The King James Bible, a highly available publication suitable for the book cipher. A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key. A simple version of such a cipher would use a specific book as the key, and would replace each word of the plaintext by a number that gives the position where ...
Codenames is a 2015 party board game designed by Vlaada Chvátil and published by Czech Games Edition. Two teams compete by each having a "spymaster" give one-word clues that can point to multiple words on the board. The other players on the team attempt to guess their team's words while avoiding the words of the other team. Codenames received positive reviews and won the 2016 Spiel des Jahres ...
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. Baconian ciphers are categorized as both a substitution cipher (in plain code) and a concealment cipher (using the two ...
The tap code, sometimes called the knock code, is a way to encode text messages on a letter-by-letter basis in a very simple way. The message is transmitted using a series of tap sounds, hence its name.