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  2. Outline of cryptography - Wikipedia

    en.wikipedia.org/wiki/Outline_of_cryptography

    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 disciplines of mathematics, computer science, and engineering. Applications of cryptography include ATM cards, computer passwords, and electronic ...

  3. Cryptography - Wikipedia

    en.wikipedia.org/wiki/Cryptography

    Since then cryptography has broadened in scope, and now makes extensive use of mathematical subdisciplines, including information theory, computational complexity, statistics, combinatorics, abstract algebra, number theory, and finite mathematics. [43] Cryptography is also a branch of engineering, but an unusual one since it deals with active ...

  4. Group-based cryptography - Wikipedia

    en.wikipedia.org/wiki/Group-based_cryptography

    Group-based cryptography is a use of groups to construct cryptographic primitives. A group is a very general algebraic object and most cryptographic schemes use groups in some way. A group is a very general algebraic object and most cryptographic schemes use groups in some way.

  5. Encryption - Wikipedia

    en.wikipedia.org/wiki/Encryption

    Historically, various forms of encryption have been used to aid in cryptography. Early encryption techniques were often used in military messaging. Since then, new techniques have emerged and become commonplace in all areas of modern computing. [1] Modern encryption schemes use the concepts of public-key and symmetric-key. [1]

  6. Coding theory - Wikipedia

    en.wikipedia.org/wiki/Coding_theory

    Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical ...

  7. Cipher - Wikipedia

    en.wikipedia.org/wiki/Cipher

    Edward Larsson's rune cipher resembling that found on the Kensington Runestone.Also includes runically unrelated blackletter writing style and pigpen 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.

  8. Confusion and diffusion - Wikipedia

    en.wikipedia.org/wiki/Confusion_and_diffusion

    In cryptography, confusion and diffusion are two properties of a secure cipher identified by Claude Shannon in his 1945 classified report A Mathematical Theory of Cryptography. [1] These properties, when present, work together to thwart the application of statistics , and other methods of cryptanalysis .

  9. Keystream - Wikipedia

    en.wikipedia.org/wiki/Keystream

    In cryptography, a keystream is a stream of random or pseudorandom characters that are combined with a plaintext message to produce an encrypted message (the ciphertext).. The "characters" in the keystream can be bits, bytes, numbers or actual characters like A-Z depending on the usage case.