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  2. One-time pad - Wikipedia

    en.wikipedia.org/wiki/One-time_pad

    In cryptography, the one-time pad (OTP) is an encryption technique that cannot be cracked, but requires the use of a single-use pre-shared key that is larger than or equal to the size of the message being sent. In this technique, a plaintext is paired with a random secret key (also referred to as a one-time pad).

  3. Glossary of cryptographic keys - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_cryptographic_keys

    A sample NSA one-time pad. one time pad (OTP or OTPad) - keying material that should be as long as the plaintext and should only be used once. If truly random and not reused it's the most secure encryption method. See one-time pad article.

  4. OTP - Wikipedia

    en.wikipedia.org/wiki/OTP

    One-time pad, in cryptography; One-time password or one-time PIN, a password or PIN that is valid for only one login session or transaction; One-time programmable memory, a type of programmable read-only memory (ROM) in electronics; Open Telecom Platform, a collection of middleware, libraries, and tools written in Erlang programming language

  5. Confusion and diffusion - Wikipedia

    en.wikipedia.org/wiki/Confusion_and_diffusion

    Although ciphers can be confusion-only (substitution cipher, one-time pad) or diffusion-only (transposition cipher), any "reasonable" block cipher uses both confusion and diffusion. [2] These concepts are also important in the design of cryptographic hash functions , and pseudorandom number generators , where decorrelation of the generated ...

  6. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    In cryptography, a message authentication code (MAC), sometimes known as an authentication tag, is a short piece of information used for authenticating and integrity-checking a message. In other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed (its integrity).

  7. Substitution cipher - Wikipedia

    en.wikipedia.org/wiki/Substitution_cipher

    In cryptography, a substitution cipher is a method of encrypting in which units of plaintext are replaced with the ciphertext, in a defined manner, with the help of a key; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth.

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    mail.aol.com

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  9. Cryptography - Wikipedia

    en.wikipedia.org/wiki/Cryptography

    However, in cryptography, code has a more specific meaning: the replacement of a unit of plaintext (i.e., a meaningful word or phrase) with a code word (for example, "wallaby" replaces "attack at dawn"). A cypher, in contrast, is a scheme for changing or substituting an element below such a level (a letter, a syllable, or a pair of letters, etc ...