alt Hacker NewsYour example completely ignores the temporal dimension.
The best practice was to rotate your passwords, but we discovered that this led users to picking less secure and easier to remember passwords and patterns.
Once technology offered up solutions to problems like password managers and breach notifications, that recommendation changed.
PCI used to mandate password changes for in-scope accounts (meaning they have access to credit card flows). Now that MFA is widely deployed that requirement only remains for accounts that do not have a second factor for authentication.
If you were ahead of the curve and implemented strong password policies that did not conform the the PCI baseline, all you had to do was explain to the auditor why. Assuming what you were doing genuinely increased your security posture it would be approved.
They specifically addressed the temporal element:
> They haven’t kept up.
Other standards all used to recommend password rotation. Most have amended it to deprecate or even prohibit password rotation.
> Once technology offered up solutions to problems like password managers and breach notifications, that recommendation changed
It wasn’t just that.
The original recommendation for password expiration failed to take into account the human practices that resulted.
Everyone has worked in an office with passwords on post-it notes, or seen passwords numbered with sequentially incremented integers at the end. Password rotation isn’t merely a baseline level of assurance, it has a negative impact on security because of the effect it has on password hygiene. In practice, passwords that expire can be easily guessed by appending something to the end of the prior password. And they are more likely to be written down in plaintext.
Permanent, non-expiring passwords without MFA are stronger in practice than expiring passwords.