1) The ability to make it more computationally expensive allows your hashing scheme to scale with Moore's law. 2) BCrypt's documentation lives here: http://www.

1) The ability to make it more computationally expensive allows your hashing scheme to scale with Moore's law. 2) BCrypt's documentation lives here: http://www.usenix.org/events/usenix99/provos/provos_html/index.html http://www.usenix.org/events/usenix99/provos/provos_html/ind... 3) bcrypt-ruby handles this for you automatically, it works quite well, and the documentation tells you how it works: http://bcrypt-ruby.rubyforge.org/ http://bcrypt-ruby.rubyforge.org/