Additional Resources

http://stackoverflow.com/a/30308723/70465

https://csrc.nist.gov/publications/detail/sp/800-132/final

https://www.owasp.org/index.php/Password_Storage_Cheat_Sheet#Work_Factor

http://security.stackexchange.com/a/3993/16485

http://blog.ircmaxell.com/2014/03/why-i-dont-recommend-scrypt.html

http://security.stackexchange.com/a/26253/16485

http://security.stackexchange.com/a/6415/16485

http://wildlyinaccurate.com/bcrypt-choosing-a-work-factor/

https://docs.spring.io/spring-security/site/docs/current/api/org/springframework/security/crypto/bcrypt/BCrypt.html

http://security.stackexchange.com/a/29139/16485