# Tags

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.

 Type to find tags:
 2nd-preimage-resistance× 16 Difficulty of finding another input string that hashes to the same value as a given string 3des× 26 A block cypher encryption algorithm built from applying three iterations of the original DES algorithm. access-control a possible goal of cryptography, where the idea is to restrict access to documents, equipment, locations, or keys to individuals who are authorized such access. accumulators× 5 a one way membership function. It answers a query as to whether a potential candidate is a member of a set without revealing the individual members of the set. acoustic-cryptanalysis a type of side channel attack which exploits sounds emitted by computers or machines. adversarial-model× 7 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… aes× 450 (or Advanced Encryption Standard), a symmetrical block-cipher algorithm with a 128-bit block size, and key sizes of 128, 192 or 256 bits. algebraic-attack× 10 a method of cryptanalysis against a cipher 1)expressing the cipher operations as a system of equations. 2)substituting in known data for some of the variables. 3)sol… algorithm-design× 169 Design of cryptographic primitives (algorithms), like block ciphers, stream ciphers, random-number generators, hash functions, MACs, key exchanges, public-key encryption or signature schemes. Also tag… alternating-step× 3 a cryptographic pseudorandom number generator intended to be used in a stream cipher. anonymity× 19 Anonymity describes the state of being unknown or unacknowledged. arithmetic× 9 a branch of mathematics usually concerned with the four operations (adding, subtracting, multiplication and division) of positive numbers. asn.1× 5 a language that defines the way data is sent across dissimilar communication systems. asymmetric attack× 15 A cryptographic attack tries to theoretically and/or practically attack the security properties of a cipher and/or algorithm. attribute-based-encry× 14 a type of public-key encryption in which the key used for encryption is based on selected attributes of the readers. Decryption of the ciphertext is possible only if the … authenticated-encryption× 88 Combination of encryption and authentication in a way that ensures confidentiality and integrity. authentication× 165 successfully validating that an entity you are communicating with is actually who they claim to be. The entity typically demonstrates who they are by showing they possess a secret th… avalanche× 4 evident if, when an input is changed slightly (for example, flipping a single bit) the output changes significantly (e.g., half the output bits flip). backdoors× 17 A backdoor in a cryptosystem or algorithm allows someone to obtain access to the decrypted data, without the need for the key/password that was used to encrypt the data. bcrypt× 31 an intentionally slow hash algorithm specially designed for passwords. biclique-attack× 3 bijection× 3 a function $f$ from a set $X$ to a set $Y$ with the property that, for every $y$ in $Y$, there is exactly one $x$ in $X$ such that $f(x) = y$. It follows from … birthday-attack× 7 a cryptanalytic technique. Birthday attacks can be used to find collisions in a cryptographic hash function. For instance, suppose we have a hash function which, when supplied wit… bitcoin× 19 a digital peer-to-peer currency with no central authority. It was created in 2009 by Satoshi Nakamoto. Transactions are managed entirely by the network. bitlocker blind-signature× 18 In a blind signature scheme, the signer does not know what he is signing. This is an important building block of anonymous voting or digital cash schemes, because it allows an authority to control the… block-cipher× 255 an encryption algorithm which encrypts fixed-size blocks of plaintext to same-sized blocks of ciphertext. For good ciphers every bit of the ciphertext block depends on every bit of t… blocksize× 15 a sequence of bytes or bits, having a fixed length (the block-size). blowfish× 21 an encryption algorithm that can be used as a replacement for the DES or IDEA algorithms. Blowfish was designed in 1993 by Bruce Schneier as an alternative to existing encryption algorithm… blum-blum-shub× 6 a deterministic Pseudo-Random Bit Generator with security demonstrably reducible to that of integer factorization. brute-force-attack× 86 attempting to find a secret value by trying all possible values until the correct one is found. camellia× 4 a 128-bit, symmetrical block cipher jointly developed by Mitsubishi and NTT of Japan. cbc× 111 a method for encrypting large amounts of data with a block cipher that can only encrypt fixed length plaintexts. When used with an unpredictable initialization vector (I… cbc-mac× 21 a method of building a message authentication code from a block-cipher. ccm× 7 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. .