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Codebook information


U.S. State Department code book issued in 1899, an example of a one-part code, at the National Cryptologic Museum
Page 187 of the State Department 1899 code book, a one-part code with a choice of code word or numeric ciphertext. Numeric codes are prefixed by the page number.

A codebook is a type of document used for gathering and storing cryptography codes. Originally, codebooks were often literally books, but today "codebook" is a byword for the complete record of a series of codes, regardless of physical format.

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Codebook

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A codebook is a type of document used for gathering and storing cryptography codes. Originally, codebooks were often literally books, but today "codebook"...

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CodeBook

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CodeBook is an interoperable CAD overlay Building information modeling (BIM) software suite for Microsoft Windows. The software is currently developed...

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Block cipher mode of operation

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of the encryption modes is the electronic codebook (ECB) mode (named after conventional physical codebooks). The message is divided into blocks, and each...

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Room 40

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the conflict. Room 40 operations evolved from a captured German naval codebook, the Signalbuch der Kaiserlichen Marine (SKM), and maps (containing coded...

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Canonical Huffman code

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the overhead of the codebook. Data compressors generally work in one of two ways. Either the decompressor can infer what codebook the compressor has used...

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Content analysis

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instrument used in content analysis is the codebook or coding scheme. In qualitative content analysis the codebook is constructed and improved during coding...

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World War II

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solve the problems of complexity and security involved in using large codebooks for cryptography by designing ciphering machines, the most well-known...

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Block cipher

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into separate cipher blocks. In the simplest case, known as electronic codebook (ECB) mode, a message is first split into separate blocks of the cipher's...

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Les Vampires

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destroys the ship with his cannon. Meanwhile, Philippe finds through the red codebook that the explosive shell that landed on the "Happy Shack" came from Montmartre...

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Chinese telegraph code

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electrically telegraphing messages written with Chinese characters. A codebook is provided for encoding and decoding the Chinese telegraph code. It shows...

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Register

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language), a reserved word (keyword) and type modifier Register (codebook), a codebook, a finite list of defined terms, used i.e. as a primary key in databases...

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Pyramid vector quantization

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len(p) codebook = create_pvq_codebook(n, k) print("Number of codebook entries: " + str(len(codebook))) entry, dist = search_pvq_codebook(codebook, p) print("Best...

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Cinepak

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the V4 codebook. When coding from the V1 codebook, one codebook index per 4×4 block is written to the bitstream, and the corresponding 2×2 codebook entry...

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Japanese naval codes

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"solved" JN25 by 1941, i.e. they knew that it was a five-digit code with a codebook to translate words into five digits and there was a second "additive" book...

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Vector quantization

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transformation is usually done by projection or by using a codebook. In some cases, a codebook can be also used to entropy code the discrete value in the...

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Book cipher

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are quite laborious. Therefore, in practice, the key has usually been a codebook created for the purpose: a simple dictionary-like listing of all the words...

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The Code Book

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deals only with codes, and not with ciphers; or that the book is in fact a codebook. The Code Book covers diverse historical topics including the Man in the...

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Disk encryption theory

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Disk encryption is a special case of data at rest protection when the storage medium is a sector-addressable device (e.g., a hard disk). This article presents...

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Morse code

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for a code, Morse had planned to transmit only numerals, and to use a codebook to look up each word according to the number which had been sent. However...

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Polygamy

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form in the vast majority of cases. According to the Ethnographic Atlas Codebook, of 1,231 societies noted between from 1960 to 1980, 588 had frequent polygyny...

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Fax

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Huffman (MH), specified in T.4 as the one-dimensional coding scheme, is a codebook-based run-length encoding scheme optimised to efficiently compress whitespace...

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Free and fair election

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1177/0022343316642508. S2CID 110571606. https://www.v-dem.net/documents/24/codebook_v13.pdf Coppedge, Michael, John Gerring, Carl Henrik Knutsen, Staffan I...

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Marriage

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27–30. doi:10.1177/1069397110383947. S2CID 143952998. Ethnographic Atlas Codebook Archived 18 November 2012 at the Wayback Machine derived from George P...

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Global Terrorism Database

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encoding of the data is described in a codebook, also available as PDF download from the website. The codebook states that the database was designed to...

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