cryptography, a key derivation function (KDF) is a cryptographic algorithm that derives one or more secret keys from a secret value such as a master key, a password...
13 KB (1,645 words) - 14:47, 4 August 2024
PBKDF2 (category Key derivation functions)
cryptography, PBKDF1 and PBKDF2 (Password-Based Key Derivation Function 1 and 2) are key derivation functions with a sliding computational cost, used to reduce...
13 KB (1,341 words) - 15:37, 30 May 2024
HMAC (redirect from Keyed-Hashing Message Authentication)
of a message. An HMAC is a type of keyed hash function that can also be used in a key derivation scheme or a key stretching scheme. HMAC can provide...
18 KB (2,300 words) - 16:46, 5 August 2024
the key derivation system to go unaltered and should choose an appropriate number of hashes for the lifespan of the system). CPU-bound hash functions are...
14 KB (1,817 words) - 16:14, 17 July 2024
Brute-force attack (redirect from Exhaustive key search)
attempt to guess the key which is typically created from the password using a key derivation function. This is known as an exhaustive key search. This approach...
21 KB (2,250 words) - 15:26, 19 July 2024
Rainbow table (redirect from Reduction function)
common defense against this attack is to compute the hashes using a key derivation function that adds a "salt" to each password before hashing it, with different...
24 KB (3,446 words) - 08:05, 23 June 2024
a key derivation function NANO, a cryptocurrency, uses BLAKE2b in the proof of work, for hashing digital signatures and as a key derivation function Polkadot...
30 KB (2,848 words) - 08:36, 2 July 2024
deterministic algorithm called a key derivation function (KDF) uses a password to generate the secure cryptographic keying material to compensate for the...
12 KB (1,496 words) - 00:10, 31 May 2024
a key from shared secret, the key derivation function is typically used. Such systems almost always use symmetric key cryptographic algorithms. The term...
3 KB (410 words) - 18:43, 18 July 2024
Scrypt (category Key derivation functions)
cryptography, scrypt (pronounced "ess crypt") is a password-based key derivation function created by Colin Percival in March 2009, originally for the Tarsnap...
17 KB (1,655 words) - 22:19, 24 May 2024
a Password-Based Key Derivation Function (PBKDF) with an approved Pseudorandom Function such as HMAC with SHA-3 as the hash function of the HMAC. The...
8 KB (1,061 words) - 13:08, 12 July 2024
necessary session keys are generated by applying the key derivation function. Periodic application of the key derivation function prevents an attacker...
8 KB (1,132 words) - 15:59, 23 July 2024
Argon2 (category Key derivation functions)
Argon2 is a key derivation function that was selected as the winner of the 2015 Password Hashing Competition. It was designed by Alex Biryukov, Daniel...
14 KB (1,491 words) - 21:00, 3 April 2024
Bcrypt (category Key derivation functions)
password-based key derivation functions - where the output is then used for the purpose of password hashing rather than just key derivation. Password hashing...
26 KB (2,753 words) - 04:19, 2 July 2024
HKDF (category Key derivation functions)
HKDF is a simple key derivation function (KDF) based on the HMAC message authentication code. It was initially proposed by its authors as a building block...
6 KB (697 words) - 14:51, 26 July 2024
Double Ratchet Algorithm (section Functioning)
based on the Diffie–Hellman key exchange (DH) and a ratchet based on a key derivation function (KDF), such as a hash function, and is therefore called a...
15 KB (1,377 words) - 21:57, 2 July 2024
Elliptic-curve Diffie–Hellman (category Key-agreement protocols)
protocols based on ECDH derive a symmetric key from x k {\displaystyle x_{k}} using some hash-based key derivation function. The shared secret calculated...
13 KB (2,044 words) - 09:16, 27 May 2024
Yescrypt (category Key derivation functions)
cryptographic key derivation function function used for password hashing on Fedora Linux, Debian, Ubuntu, and Arch Linux. The function is more resistant...
2 KB (102 words) - 08:19, 12 July 2024
Shared secret (category Key management)
to a key derivation function to produce one or more keys to use for encryption and/or MACing of messages. To make unique session and message keys the shared...
2 KB (239 words) - 22:37, 3 December 2023
g^{y}} . Alice then computes a symmetric key k {\displaystyle k} using this information and a key derivation function (KDF) as follows: k = KDF ( g x y ) {\displaystyle...
6 KB (965 words) - 20:25, 27 February 2023
featuring resilience to header corruption, and using the Argon2 key derivation function by default, whereas LUKS1 uses PBKDF2. Conversion between both...
14 KB (1,175 words) - 01:55, 8 August 2024
Preimage attack (redirect from Hash function preimage)
is rated secure against preimage attacks. Special hashes called key derivation functions have been created to slow searches. See Password cracking. For...
7 KB (895 words) - 15:44, 13 April 2024
Crypt (C) (category Key derivation functions)
stored in a text file. More formally, crypt provides cryptographic key derivation functions for password validation and storage on Unix systems. There is an...
28 KB (3,039 words) - 21:59, 6 July 2024
Message authentication code (redirect from Keyed hash function)
authentication. The simplest such pairwise independent hash function is defined by the random key, key = (a, b), and the MAC tag for a message m is computed...
15 KB (1,790 words) - 04:23, 31 July 2024
set. Because cryptographic hash functions are typically designed to be computed quickly, special key derivation functions that require greater computing...
48 KB (6,228 words) - 21:37, 8 August 2024
user's password. The password entered by the user is run through a key derivation function to create a hashed version of the new password, which is saved...
15 KB (1,934 words) - 15:30, 3 August 2024
15 December 2018 – via GitHub. "Ruby C extension for the AES-CMAC keyed hash function (RFC 4493): louismullie/cmac-rb". 4 May 2016 – via GitHub. RFC 4493...
8 KB (840 words) - 12:10, 18 February 2024
other. For example, each encryption key can be generated from the underlying key material using a key derivation function. For example, a replacement for...
5 KB (688 words) - 07:27, 20 November 2023
group. A signature scheme consists of three functions: generate, sign, and verify. Key generation The key generation algorithm selects a random integer...
8 KB (823 words) - 08:44, 16 August 2024
Cryptography (section Cryptographic hash functions)
are not limited to: cryptographic keys, cryptographic hash function, asymmetric (public key) encryption, Multi-Factor Authentication (MFA), End-to-End...
98 KB (10,713 words) - 04:04, 16 August 2024