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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.
In the history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher, originally used by Russian Nihilists in the 1880s to organize terrorism against the tsarist regime. The term is sometimes extended to several improved algorithms used much later for communication by the First Chief Directorate with its spies .
Silence Dogood. Silence Dogood was the pen name used by Benjamin Franklin to get his work published in the New-England Courant, a newspaper founded and published by his brother James Franklin. This was after Benjamin Franklin was denied several times when he tried to publish letters under his own name in the Courant.
Ottendorf, Schleswig-Holstein, in the Rendsburg-Eckernförde district, Schleswig-Holstein. Ottendorf, Thuringia, in the Saale-Holzland-Kreis district, Thuringia. Ottendorf (Sebnitz), a village in the municipality of Sebnitz, Sächsische Schweiz-Osterzgebirge district, Saxony. A part of Bahretal in the Sächsische Schweiz-Osterzgebirge district ...
Category:Undeciphered historical codes and ciphers. Category. : Undeciphered historical codes and ciphers. Wikimedia Commons has media related to Uncracked codes and ciphers. A list of as-yet-undeciphered codes and ciphers, mostly of historical interest.
History of cryptography. Cryptography, the use of codes and ciphers to protect secrets, began thousands of years ago. [1] Until recent decades, it has been the story of what might be called classical cryptography — that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids.
In cryptography, a cipher (or cypher) is an algorithm for performing encryption or decryption —a series of well-defined steps that can be followed as a procedure. An alternative, less common term is encipherment. To encipher or encode is to convert information into cipher or code. In common parlance, "cipher" is synonymous with "code", as ...
The book used as a key to the cipher was either Commentaries on the Laws of England by William Blackstone or Nathan Bailey's Dictionary. The cipher consisted of a series of three numbers separated by periods. These numbers represented a page number of the agreed book, a line number on that page, and a word number in that line.