A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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the process of taking it from its mathematical or algorithmic description and producing a working version, often in computer software or hardware. This tag should …
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definition used in cryptography to describe: indistinguishability under (non-adaptive) chosen ciphertext attack (IND-CCA1), and indistinguishability under adaptive chosen ciphertext attack …
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a measure of the relative frequency of letters in a cipher text sample, which facilitates cryptanalysis of poly-alphabetic ciphers by allowing determination of the per…
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concerned with sending messages via electronic signals in the most efficient and error-free way.
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Random data used by block cipher modes of operation to randomize the output in order to achieve semantic security. Also for other similar constructs in other iterative algorithms.
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In a cryptographic sense, integrity means unimpaired and complete.
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an object-oriented programming language. Java programs are compiled to bytecode and run in a virtual machine (JVM). Java should not be confused with JavaScript; JavaScript is an entirely diff…
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a dynamic, object-oriented, prototype-based, weakly typed language commonly used for scripting in web browsers. Despite the name, it is unrelated to the Java programming language and sha…
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a key derivation function ([tag:kdf]) that uses a key in the computation.
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A “Key Derivation Function” (KDF) derives one or more secret keys from a secret value such as a master key or other known information such as a password using a pseudo-random function.
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a cryptographic hash function designed by Guido Bertoni, Joan Daemen, Michaël Peeters, and Gilles Van Assche.
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In cryptography, a key derivation function (or KDF) derives one or more secret keys from a secret value such as a master key or other known information such as a password or passphrase using a pseudo-…
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Key exchange protocols allow two parties to produce a secret session key over a public channel.
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the process of generating keys for cryptographic purposes.
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A means of recovering cryptographic keys when the usual means for obtaining them is unavailable.; the ability to uncover the secret key to a cryptographic message.
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Using the same key for more than one purpose, e.g. to encrypt two messages or to encrypt and authenticate a message. Some cryptosystems may be vulnerable to attacks if keys are inappropriately reused.
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Key rotation refers to a schedule or process for changing the key material.
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usually secret information used as input to various kinds of cryptographic algorithms, like encryption, signature, MAC, to select the concrete transformation done by the algorithm.
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an algorithm that expands a relatively short master key to a relatively large expanded key for later use in an encryption and decryption algorithm.
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the size measured in bits of the key used in a cryptographic algorithm.
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the problem of determining which numbers from a given collection of numbers have been added together to yield a specific sum: used in cryptography to encipher (and sometimes decipher) mess…
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The attacker knows at least one sample of both the plain text and the cipher text.
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A length extension attack on a hash or message authentication code function, which allows extra information to be added to the input message without changing the output value.
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Linear Feedback Shift Register, a pseudorandom bit generator which can be efficiently implemented in hardware.
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a typically short alphanumeric code used as a software copy-protection mechanism, by requiring a user to enter a valid key before they can use the software.
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Small and/or fast ciphers and other cryptographic primitives designed for use in constrained environments, such as embedded MCUs and smart cards.
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a known plaintext attack and uses a linear approximation to describe the behavior of the block cipher. Given sufficient pairs of plaintext and corresponding ciphertext, bits of…