# 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:
 deniable-encryption× 15 a type of cryptography that allows an encrypted text to be decrypted in two or more ways, depending on which decryption key is used. crc× 15 non-cryptographic error-detecting code commonly used to detect accidental changes to raw data. hotp× 15 The HMAC-based one-time password algorithm defined in RFC 4226. rainbow-table× 15 A rainbow table allows inverting a cryptographic function (typically, a hash) at low cost, after a precomputation. order-preserving× 14 a method of encrypting data so that it's possible to make efficient inequality comparisons on the encrypted items without decrypting them. key-distribution× 14 coding-theory× 14 Coding theory studies the properties of codes and their fitness for specific applications, and typically involves the removal of redundancy and the detection and/or correction of errors in transmitted… birthday-attack× 14 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… distinguishing-attack× 14 any form of cryptanalysis on data encrypted by a cipher that allows an attacker to distinguish the encrypted data from random data. enigma× 14 The Enigma Machine was a piece of cryptographic hardware used by the German military during World War II; successful cryptanalysis was routinely applied against it and the scheme was considered broken… fips-140× 14 a U.S. government computer security standard used to accredit cryptographic modules. transposition-cipher× 14 A classical cipher in which the ciphertext is obtained by scrambling the letters of the plaintext. twofish× 14 A symmetric block-cipher algorithm with a 128-bit block size, and key sizes up to 256 bits. safe-prime× 14 a prime number of the form 2p + 1, where p is also a prime. secure-storage× 14 Secure storage describes storing resources in a secure way, so that they are only available to authorized users and trusted networks. trapdoor× 13 a function that is easy to perform one way, but has a secret that is required to perform the inverse calculation efficiently. xts× 13 a block cipher mode of operation, which is most commonly used when random accessible data (like a hard disk or RAM) is to be encoded. functional-encryption× 13 a type of public-key encryption, where the party that has access to a secret key can learn a function from that key, which is used to encrypt and decrypt messages. accumulators× 13 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. cmac× 13 a block cipher-based message authentication code algorithm. challenge-response× 13 a family of protocols in which one party presents a question ("challenge") and another party must provide a valid answer ("response") to be authenticated. commutative-encryption× 13 A commutative encryption system allows a message encrypted with two different keys to be decrypted using the keys in either order. montgomery-multiplication× 13 quadratic-residuosity× 13 A residue of order 2. A number $a$ for which the congruence $x^2 ≡ a \pmod m$ has a solution is called a quadratic residue modulo $m$. prg× 12 Pseudo-Random Generator pohlig-hellman× 12 a symmetric cipher. In number theory, the Pohlig–Hellman algorithm sometimes is a special-purpose algorithm for computing discrete logarithms in a multiplicative gro… ciphertext-only-attack× 12 a form of cryptographic attack in which the attacker possesses only the encrypted message, with no corresponding plain text or segment of the key to work with. asn.1× 12 a language that defines the way data is sent across dissimilar communication systems. frequency-analysis× 12 the study of letters or groups of letters contained in a ciphertext in an attempt to partially reveal the message. digital-cash× 12 Money that may be transferred electronically from one party to another during a transaction. dictionary-attack× 12 In cryptanalysis and computer security, a dictionary attack is a technique for defeating a cipher or authentication mechanism by trying to determine its decryption key or pass-phrase by trying hundred… voting× 12 a method for a group such as a meeting or an electorate to make a decision or express an opinion. white-box× 11 In cryptography, white box analysis means extracting a secret value from an implementation of a function that uses the value. verifiability× 11 eax× 11 An authenticated encryption mode of operation for a block cipher, based on the CTR mode and the OMAC/CMAC MAC algorithm. blum-blum-shub× 11 a deterministic Pseudo-Random Bit Generator with security demonstrably reducible to that of integer factorization.