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15 relations: Block cipher, Block cipher mode of operation, Book, Book cipher, Cipher, Code (cryptography), Commercial code (communications), Cryptography, Key (cryptography), Lookup table, National Security Agency, Physical security, Running key cipher, Stream cipher, The Code Book.
Block cipher
In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called a block, with an unvarying transformation that is specified by a symmetric key.
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Block cipher mode of operation
In cryptography, a block cipher mode of operation is an algorithm that uses a block cipher to provide an information service such as confidentiality or authenticity.
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Book
A book is a series of pages assembled for easy portability and reading, as well as the composition contained in it.
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Book cipher
A book cipher is a cipher in which the key is some aspect of a book or other piece of text.
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Cipher
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.
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Code (cryptography)
Cryptography in simple terms means the use of any alphabet or numerical statement which has a meaning or stores a message.
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Commercial code (communications)
In telecommunication, a commercial code is a code once used to save on cablegram costs.
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Cryptography
Cryptography or cryptology (from κρυπτός|translit.
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Key (cryptography)
In cryptography, a key is a piece of information (a parameter) that determines the functional output of a cryptographic algorithm.
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Lookup table
In computer science, a lookup table is an array that replaces runtime computation with a simpler array indexing operation.
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National Security Agency
The National Security Agency (NSA) is a national-level intelligence agency of the United States Department of Defense, under the authority of the Director of National Intelligence.
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Physical security
Physical security describes security measures that are designed to deny unauthorized access to facilities, equipment and resources and to protect personnel and property from damage or harm (such as espionage, theft, or terrorist attacks).
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Running key cipher
In classical cryptography, the running key cipher is a type of polyalphabetic substitution cipher in which a text, typically from a book, is used to provide a very long keystream.
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Stream cipher
A stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream (keystream).
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The Code Book
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography is a book by Simon Singh, published in New York in 1999 by Doubleday.
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