Aspects


vs


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

Quality Example
Better option bcrypt

"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+)"

Stronger

"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?"

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