Explanation of optimal scrypt cost parameters and relationships
NIST Special Publication 800-132
OWASP Password Storage Work Factor Calculations
PBKDF2 rounds calculations
Scrypt as KDF vs password storage vulnerabilities
Scrypt vs. Bcrypt (as of 2010)
Bcrypt vs PBKDF2
Choosing a work factor for Bcrypt
OpenSSL EVP BytesToKey PKCS#1v1.5
OpenSSL PBKDF2 KDF
OpenSSL KDF flaws description