If I read you correctly, your idea is to re-hash passwords every now and then as computers get faster, am I right? Assuming that I am, here's my question.

Once the hash of a password gets stored, we really have no longer have an idea of what the actual password is. In an ideal world, even when the user tries to log in, a hash of his password is sent, and then the stored hash and the stored hash are compared to determine the successfulness of a login attempt.

Given this, how do you propose the password is re-hashed without having the original password to work from?

In reply to Re: Adjust bcrypt cost to prevent future password hash attacks by muba
in thread Adjust bcrypt cost to prevent future password hash attacks by andreas1234567

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