This is called a pepper: https://en.wikipedia.org/wiki/Pepper_(cryptography) https://en.wikipedia.org/wiki/Pepper_(cryptography) If you read the article above

This is called a pepper: https://en.wikipedia.org/wiki/Pepper_(cryptography) https://en.wikipedia.org/wiki/Pepper_(cryptography) If you read the article above, you'll see that you still need a salt, since users with very simple passwords will have the same hash: crack one, and you can crack the others for free.