# 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:
 linear-cryptanalysis× 11 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… length-extension× 11 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. oblivious-transfer× 11 Oblivious transfer refers to a cryptographic protocol in which a sender possesses a set of data and a receiver queries the sender for a particular member of that set in such a way that the sender does… padding-oracle× 11 A side-channel attack on implementations of encryption modes that use padding (e.g. ECB, CBC) that uses information leaked during decryption of tampered ciphertext values to derive information about t… replay-attack× 11 based on recording an encrypted and/or signed communication and replaying it at a later time. schnorr-signature× 10 A digital signature algorithm based on the discrete logarithm problem, provably secure in the random oracle model. ofb× 10 an encryption mode, that builds a synchronous stream-cipher from a block-cipher. ntru× 10 an encryption algorithm which is based on the shortest vector problem in a lattice. nonce× 10 an arbitrary number or string used only once within the context of a specific cryptographic scheme. Nonces are used e.g. in authentication protocols to prevent replay attacks, as well as … differential-analysis× 10 a form of cryptanalysis which studies cryptographic algorithms by observing how differences in input affect differences on output. 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… ind-cca× 10 definition used in cryptography to describe: indistinguishability under (non-adaptive) chosen ciphertext attack (IND-CCA1), and indistinguishability under adaptive chosen ciphertext attack … forgery× 10 the process of making, adapting, or imitating objects, statistics, or documents with the intent to deceive. forward-secrecy× 10 A security property wherein past messages are protected against future compromise of the master keys. steganography× 10 the art and science of writing hidden messages in such a way that no one, apart from the sender and intended recipient, suspects the existence of the message. While cryptography prot… ssh× 10 an authentication protocol (described in RFC 4252) for securely getting access to a remote computer. srp× 9 Secure remote password protocol srp-6× 9 Secure Remote Password protocol version 6. timestamping× 9 the current time of an event that is recorded by a computer. You can use digital timestamps via a trusted authority to certify and protect your intellectual property or your … distinguishing-attack× 9 any form of cryptanalysis on data encrypted by a cipher that allows an attacker to distinguish the encrypted data from random data. disk-encryption× 9 Disk encryption protects information by encrypting every byte that is written to a HD or virtual disk volume. hash-tree× 9 a method of hierarchically hashing data. They allow efficient parallel hashing and updates and the possibility of verifying partial data. arithmetic× 9 a branch of mathematics usually concerned with the four operations (adding, subtracting, multiplication and division) of positive numbers. attack× 9 A cryptographic attack tries to theoretically and/or practically attack the security properties of a cipher and/or algorithm. crc× 9 non-cryptographic error-detecting code commonly used to detect accidental changes to raw data. multiple-encryption× 9 Multiple encryption means encrypting a message two or more times using either the same, or a different algorithm. order-preserving× 9 a method of encrypting data so that it's possible to make efficient inequality comparisons on the encrypted items without decrypting them. identity-based-encryption× 9 In identity-based encryption (IBE) the public key of a user $A$ is some identity string $ID_A$, e.g., an email address. To encrypt a message for this user there is no need to retrieve an authentic cop… merkle-damgard× 9 The Merkle–Damgård construction — used in the design of many popular hash algorithms such as MD5, SHA1 and SHA2 — is a method of building collision-resistant cryptographic hash functions from collisio… sha512× 9 part of the SHA-2 family of hash functions with a 512-bit output and a 256-bit security level. serpent× 9 A symmetric block cipher algorithm with a 128 bit block size, and key sizes up to 256 bits. salsa20× 8 a stream cipher built on a pseudo-random function. pohlig-hellman× 8 a symmetric cipher. In number theory, the Pohlig–Hellman algorithm sometimes is a special-purpose algorithm for computing discrete logarithms in a multiplicative gro… pseudo-random-permutation× 8 a function that cannot be distinguished (with practical effort) from a permutation selected at random with uniform probability from the family of all permutations … perfect-secrecy× 8 ciphertext-only-attack× 8 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.