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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.
A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet arranged around their edge in an order, which is different for each disk ...
A cryptogram is a type of puzzle that consists of a short piece of encrypted text. [1] Generally the cipher used to encrypt the text is simple enough that the cryptogram can be solved by hand. Substitution ciphers where each letter is replaced by a different letter or number are frequently used. To solve the puzzle, one must recover the ...
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.
Alice and Bob are fictional characters commonly used as placeholders in discussions about cryptographic systems and protocols, [1] and in other science and engineering literature where there are several participants in a thought experiment. The Alice and Bob characters were invented by Ron Rivest, Adi Shamir, and Leonard Adleman in their 1978 ...
Inspiration and origin. Chasing Vermeer is Blue Balliett's first published book. Its original purpose was a book to read to her class for fun. She realized that a mystery about "real" art issues had not been written since E.L. Konigsburg's 1967 novel From the Mixed-Up Files of Mrs. Basil E. Frankweiler, and desired to write what she wished to read.
BASIC Computer Games is a compilation of type-in computer games in the BASIC programming language collected by David H. Ahl. Some of the games were written or modified by Ahl as well. Among its better-known games are Hamurabi and Super Star Trek . Originally published by DEC in 1973 as 101 BASIC Computer Games, the book was so popular that it ...
Clue (book series) The Clue series is a book series of 18 children's books published throughout the 1990s based on the board game Clue. The books are compilations of mini-mysteries that the reader must solve involving various crimes committed at the home of Reginald Boddy by six of his closest "friends".
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