The zxcvbn blog/source mentions that the score is related to estimated cracktime. I think this will be relative and increasing over time as computers get more powerful. But whats the current recomended formula to convert entropy to cracktime? How can I calculate a score for now? When should I reevaluate?
Heres what I found but how to know what guesses is made from and how to make the formula?
0 = guesses < 10^3 1 = guesses < 10^6 2 = guesses < 10^8 3 = guesses < 10^10 4 = guesses >= 10^10
IOW what are recomended entropy gradients for password strength nowadays?