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Pbkdf2

PBKDF2 (Password-Based Key Derivation Function 2) is a key derivation function that is part of RSA Laboratories' Public-Key Cryptography Standards (PKCS) series.

Scrypt

SCrypt is a key derivation function (KDF) based on the concept of sequential memory-hard functions mostly used for password hashing.



Others

Example

Pbkdf2 is arguably a better option than bcrypt scrypt having been much more thoroughly studied and tested

from question  

Password Security for Shared Hosts (PHP 5.2+)

Bcrypt is weaker than scrypt although still three orders of magnitude stronger than pbkdf2 because it only requires 4 kb of memory

from question  

What are optimal scrypt work factors?

The scrypt one is clearly better;pbkdf2 is using 20 000 iterations

from question  

Cisco IOS password types - relative security

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