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Convergent encryption, also known as content hash keying, is simply encrypting a file using a symmetric encryption key which is the secure hash of the plaintext of the file.
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Money that may be transferred electronically from one party to another during a transaction.
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An authenticated encryption mode of operation for a block cipher, based on the CTR mode and the OMAC/CMAC MAC algorithm.
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Calculating the value of a function for given inputs, especially, in the context of secure multi-party computation and/or homomorphic encryption, without disclosing the inputs to some or all parties c…
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the study of letters or groups of letters contained in a ciphertext in an attempt to partially reveal the message.
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The Counter with CBC Mac mode, an authenticated encryption mode of operation for a block cipher based on the CTR mode and the CBC-MAC algorithm. .
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the assurance that someone cannot deny something.
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the product of more than two primes.
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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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"host-proof" means that no unencrypted or insecure data is stored on the server or passed over the network.
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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 family of permutations where the key selects a particular permutation from that family. With a tweakable blockcipher both key and tweak are used to select a permutation. So tweak a…
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A classical cipher in which the ciphertext is obtained by scrambling the letters of the plaintext.
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the deliberate act of creating obfuscated code by making source or machine code difficult to understand from a human point of view.
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a cryptographic hash function. It was designed for the SHA-3 competition where it became a finalist, but wasn't chosen as SHA-3.
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Time-lock puzzles and other cryptographic schemes intended to ensure that a message cannot be read until a certain time has passed.
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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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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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a Password Based Key Derivation Function, which can be used to derive key data or derive a "password hash" from a salt and password.
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a padding scheme which has been standardized in [PKCS #1v29](http://www.emc.com/collateral/white-papers/h11300-pkcs-1v2-2-rsa-cryptography-standard-wp.pdf) and…
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A public-key cryptosystem based on squaring modulo the product of two primes, introduced in 1979 by Michael O. Rabin and proven to have security reducible to the hardness of integer factorization.
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The RACE Integrity Primitives Evaluation Message Digest (RIPEMD) is a family of cryptographic hash functions.
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a language that defines the way data is sent across dissimilar communication systems.
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An adversary model formally defines the power of the adversary. It includes specifics whether the adversary is deterministic/randomized, uniform/non-uniform, interactive/non-interactive and how he int…
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Copy protection or content protection covers various mechanism, such as DRM and software license keys, used to restrict the unauthorized copying or use of software or digital media.
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a variant of ID-based cryptography intended to prevent the key escrow problem. Only a partial private key is generated by the key generation center (KGC) and the other …
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a family of cryptographically secure PRNGs; devised by Bruce Schneier and Niels Ferguson, who published it in 2003.
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The International Data Encryption Algorithm (IDEA) is a block cipher developed in 1991 by James Massey and Xuejia Lai.