Codebook

A codebook is a type of document used for gathering and storing 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.

Cryptography

In cryptography, a codebook is a document used for implementing a code. A codebook contains a lookup table for coding and decoding; each word or phrase has one or more strings which replace it. To decipher messages written in code, corresponding copies of the codebook must be available at either end. The distribution and physical security of codebooks presents a special difficulty in the use of codes, compared to the secret information used in ciphers, the key, which is typically much shorter.

The United States National Security Agency documents sometimes use codebook to refer to block ciphers; compare their use of combiner-type algorithm to refer to stream ciphers.

A codebook is usually made in two parts, one part being for converting plaintext to ciphertext, the other for the opposite purpose. Both are usually organized similar to a standard dictionary, with plaintext words (in the first part) and ciphertext words (in the second part) presented like dictionary headwords.

Codebook (disambiguation)

A codebook is a type of document used for gathering and storing codes.

Codebook may also refer to:

CodeBook

CodeBook is an interoperable CAD overlay Building information modeling (BIM) software suite for Microsoft Windows. The software is currently developed by UK company, Codebook International Ltd.

The software allows the user to design using the conventional design tools (for example: Autodesk Revit, Bentley Microstation, Graphisoft ArchiCAD) and elements, and to create and interrogate a separate BIM database. CodeBook's BIM database contains information gathered during the building's full life cycle, from scoping and concept stages through detailed design and construction to CMMS/FM handover.

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