I'm rebuilding a registration system with the model from your book, but I keep coming across articles that say SHA1, SALT, and SHA256 are not very useful anymore. Therefore, I am thinking of using scrypt, or something like it to handle encryption. Is this an overblown issue? If it is a valid concern, do you have any advice on how to implement it with the code from the book? I am using a hosted server, in case that is important for downloading etc.