Possible Duplicate:
Secure hash and salt for PHP passwords
I am making a system that has stores user credentials (email, username and password) in a MySQL database and have seen conflicting views on using encryption, salting and encryption types.
What are the best methods you would recommend? Encoding in MD5 or SHA1? Salting or not salting? Encrypting just the password or all 3 elements?
For the password hash use PBKDF2 it's NIST approved. You should use a random non-secret salt for each password and nontrivial (over 1000) iteration count.
For the username and email, probably not worth encrypting.