classical cryptography

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• Classical cipher — A cipher is a means of concealing a message, where letters of the message are substituted or transposed for other letters, letter pairs, and sometimes for many letters. In cryptography, a classical cipher is a type of cipher that was used… …   Wikipedia

• Classical compound — Classical compounds (also known as neoclassical compounds, and combining forms) are compound words composed from Latin or Ancient Greek root words. A large portion of the technical and scientific lexicon of English and other Western European… …   Wikipedia

• Cryptography — Secret code redirects here. For the Aya Kamiki album, see Secret Code. Symmetric key cryptography, where the same key is used both for encryption and decryption …   Wikipedia

• Classical information channel — In quantum information science, classical information channel (often called simply classical channel) is a communication channel that can be used to transmit classical information (as opposed to quantum channel which can transmit quantum… …   Wikipedia

• Cryptography Classification — Classification of Cryptographic Systems, Ciphers, Algorithms1. This classification scheme has to do with the means of implementation 1.1. Classical : Pre Computer Era involvements of (e.g. before 1950) 1.2. Modern : Computer Era. Usually implies… …   Wikipedia

• Quantum cryptography — Quantum cryptography, or quantum key distribution (QKD), uses quantum mechanics to guarantee secure communication. It enables two parties to produce a shared random bit string known only to them, which can be used as a key to encrypt and decrypt… …   Wikipedia

• History of cryptography — The history of cryptography begins thousands of years ago. Until recent decades, it has been the story of what might be called classic cryptography that is, of methods of encryption that use pen and paper, or perhaps simple mechanical aids. In… …   Wikipedia

• Padding (cryptography) — In cryptography, padding refers to a number of distinct practices.Classical cryptographyOfficial messages often start and end in predictable ways: My dear ambassador, Weather report, Sincerely yours , etc. The primary use of padding with… …   Wikipedia

• Outline of cryptography — See also: Index of cryptography articles The following outline is provided as an overview of and topical guide to cryptography: Cryptography (or cryptology) – practice and study of hiding information. Modern cryptography intersects the… …   Wikipedia

• Topics in cryptography — This article is intended to be an analytic glossary , or alternatively, an organized collection of annotated pointers.Classical ciphers*Autokey cipher *Permutation cipher*Polyalphabetic substitution **Vigenère cipher*Polygraphic substitution… …   Wikipedia

• Books on cryptography — have been published sporadically and with highly variable quality for a long time. This is despite the tempting, though superficial, paradox that secrecy is of the essence in sending confidential messages mdash; see Kerckhoffs principle. In… …   Wikipedia