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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 that word occurs in that book.
The Da Vinci Code is a 2003 mystery thriller novel by Dan Brown. It is Brown's second novel to include the character Robert Langdon: the first was his 2000 novel Angels & Demons. The Da Vinci Code follows symbologist Langdon and cryptologist Sophie Neveu after a murder in the Louvre Museum in Paris entangles them in a dispute between the Priory ...
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 ...
A recording of The Gong numbers station, run by the National People's Army of the German Democratic Republic, from 1988. A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1]
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography is a book by Simon Singh, published in 1999 by Fourth Estate and Doubleday. The Code Book describes some illustrative highlights in the history of cryptography , drawn from both of its principal branches, codes and ciphers .
Codes generally substitute different length strings of characters in the output, while ciphers generally substitute the same number of characters as are input. A code maps one meaning with another. Words and phrases can be coded as letters or numbers. Codes typically have direct meaning from input to key. Codes primarily function to save time.
In 1974, Khalifa claimed to have discovered a mathematical code hidden in the Quran, a code based around the number 19. He wrote the book The Computer Speaks: God's Message to the World, in which he thematizes this Quran code. He relies on Surah 74, verse 30 to prove the significance of the number: "Over it is nineteen,".
Secret Number's official logo. According to the group, their name means that, "Everyone has a secret number [for a password or PIN code], which is usually a birthday, anniversary, or some other special number. We want to hold such special meaning in public. Our logo is designed like a password box with five stars, representing the five of us." [1]