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Playfair cipher. The Playfair cipher uses a 5×5 grid of letters, and encrypts a message by breaking the text into pairs of letters and swapping them according to their positions in a rectangle within that grid: "HI" becomes "BM". The Playfair cipher or Playfair square or Wheatstone–Playfair cipher is a manual symmetric encryption technique ...
In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code, or Caesar shift, is one of the simplest and most widely known encryption techniques. It is a type of substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet .
Decipherment of ancient Egyptian scripts. Jean-François Champollion in 1823, holding his list of phonetic hieroglyphic signs. Portrait by Victorine-Angélique-Amélie Rumilly [ fr]. The writing systems used in ancient Egypt were deciphered in the early nineteenth century through the work of several European scholars, especially Jean-François ...
Rosetta Stone. The Rosetta Stone is a stele of granodiorite inscribed with three versions of a decree issued in 196 BC during the Ptolemaic dynasty of Egypt, on behalf of King Ptolemy V Epiphanes. The top and middle texts are in Ancient Egyptian using hieroglyphic and Demotic scripts, respectively, while the bottom is in Ancient Greek.
Location. George Bush Center for Intelligence, Langley, Virginia. Coordinates. 38°57′08″N 77°08′45″W. / 38.95227°N 77.14573°W / 38.95227; -77.14573. 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 ...
Decipher III: Unsolved [2] 1990 Kryptos: Partially solved (3 out of the 4 ciphertexts solved between 1992–1999) 1991 Scorpion ciphers [3] Unsolved 1999 Ricky McCormick's encrypted notes: Unsolved 2006 Smithy code, embedded within the 2006 judgment on The Da Vinci Code case Solved within month of publication 2012–2016 Cicada 3301 puzzles
OCLC. 27866939. Preceded by. The Mystery of the 99 Steps. Followed by. The Spider Sapphire Mystery. The Clue in the Crossword Cipher is the forty-fourth volume in the Nancy Drew Mystery Stories series. [ 1] It was first published in 1967 under the pseudonym Carolyn Keene. [ 2] The actual author was ghostwriter Harriet Stratemeyer Adams .
Certificate – X, U, PG, R, G (from the film certificates) Charged – ION. Charlie – C ( NATO phonetic alphabet) Chartered accountant – CA. Chief – CH. Chlorine – CL (chemical symbol) Chromosome – X or Y. Church – CH or CE ( Church of England) or RC ( Roman Catholic) Circa – C.