The salt does exactly one thing: it makes the attacker pay to get each password, as opposed to making them pay once and get all of them. When the cost is a fr

The salt does exactly one thing: it makes the attacker pay to get each password, as opposed to making them pay once and get all of them. When the cost is a fraction of a second on a commodity CUDA setup, it's not really that helpful to make an attacker pay it multiple times.