# 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:
 feistel-network× 24 a structure that has been used to create a number of different block ciphers (e.g., DES, Blowfish, Twofish, RC6). fiat-shamir× 5 file-encryption× 51 The process of encrypting individual files on a storage medium and permitting access to the encrypted data only after proper authentication is provided. finite-field× 46 a mathematical construct based on a set of axioms which are held to be true. A number of interesting and useful properties arise from finite fields that makes them particularly suita… fips-140× 8 a U.S. government computer security standard used to accredit cryptographic modules. forgery× 13 the process of making, adapting, or imitating objects, statistics, or documents with the intent to deceive. format-preserving× 21 Format-preserving encryption (FPE) refers to encrypting in such a way that the output has the same length as the input, or otherwise has the same format or structure as the input. fortuna× 6 a family of cryptographically secure PRNGs; devised by Bruce Schneier and Niels Ferguson, who published it in 2003. forward-secrecy× 15 A security property wherein past messages are protected against future compromise of the master keys. frequency-analysis× 6 the study of letters or groups of letters contained in a ciphertext in an attempt to partially reveal the message. functional-encryption× 10 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. function-evaluation× 8 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… gcm× 38 The Galois Counter Mode, an authenticated encryption mode of operation for a block cipher. gnupg gpg group-theory× 46 an abstract algebraic concept based on a set and a group law (a binary function which closes the set). hamming× 3 a family of binary, linear error-correcting codes that are used to detect and correct data transmission errors. Hamming codes are able detect up to two simultaneous bit errors and ca… hash× 655 a function which takes a variable size input and produces a fixed size output. The algorithm makes it difficult to predict the output for a given input, find two inpu… hash-collision hashed-elgamal× 2 hash-signature× 31 Hash-based digital signatures, such as Lamport one-time signatures, are digital signature schemes based on a (non-trapdoor) one-way function such as a cryptographic hash. Such schemes are expected to … hash-tree× 15 a method of hierarchically hashing data. They allow efficient parallel hashing and updates and the possibility of verifying partial data. hermitian-curves× 2 hill-cipher× 17 a historic polygraphic substitution cipher invented by Lester S. Hill in 1929. historic× 21 for questions about cryptographic algorithms which were invented (and used) before the computer age. history× 16 History of cryptography and cryptanalysis. Questions that wish to ask about the history of cryptography should use this tag; if you're asking about historical ciphers you may also wish to use the clas… hkdf× 18 a key derivation function specified in RFC5869. hmac× 134 a method for constructing a message authentication code based on a cryptographic hash function. homomorphic-encryption× 131 Cryptosystems which support computation on encrypted data. They might be partially homomorphic (support for one operation such as + or *) or they might be fully homomorphic (+ and * at the same time). homomorphic-signatures× 2 A homomorphic signature scheme (also malleable signature scheme) is a digital signature scheme that allows computations on signed data (without access to the secret signing key) while preserving the… host-proof× 8 "host-proof" means that no unencrypted or insecure data is stored on the server or passed over the network. hotp× 14 The HMAC-based one-time password algorithm defined in RFC 4226. https hybrid× 2 Something of mixed origin. In cryptography, typically a cipher system containing both public key and secret key component ciphers, where the public key system is used only to transport the key for the… idea× 6 The International Data Encryption Algorithm (IDEA) is a block cipher developed in 1991 by James Massey and Xuejia Lai. identity-based-encryption× 22 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…