April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Introduction to key derivation functions
Asymmetric cryptography algorithms define the nature of their keys and how the keys should be generated because the keys need to be related. For example, the RSA key generation algorithm is deterministic.
Symmetric cryptography algorithms only define key sizes. It's up to us to generate the keys. There are various algorithms to generate these keys. One such algorithm is KDF.
A key derivation function (KDF) is a deterministic algorithm to derive a symmetric key from some secret value (such as master key, password, or passphrase). There are various types of KDFs, such as bcrypt, crypt, PBKDF2, scrypt, HKDF, and so on. You can learn more about KDFs at https://en.wikipedia.org/wiki/Key_derivation_function ...
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