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I am currently reviewing Drupal 8's security features and was wondering about how Drupal stores user passwords. I know Drupal uses salted hashes to store the password in the database, but does Drupal also store a user's previously used passwords so that they can't reuse them again? If it does, does that list have a hard limit to it (i.e. does it only store the last twenty used passwords before recycling the list)?

I am only interested in the out of the box experience with Drupal 8. I know there are modules that you can use to add extra functionality/security to user passwords but that isn't part of this question.

Thanks.

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Out of the box, Drupal only stores the salted hash for the current password. No previous passwords are stored without the help of a contrib module such as Password Policy.

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Take a look a the Guardr distribution it has all of the security modules already integrated and configured.

Even if you don't use it, they do a good job of pointing out the security modules available.

  • Thanks for the suggestion, I was unaware of this distribution. – user5013 Dec 6 '17 at 16:33

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