harrym

WordPress uses phpass to store passwords. Because WordPress has to work everywere, it uses the portable version of phpass, 
which uses MD5 to hash passwords. MD5 is not a very good hashing algorithm for passwords, because it’s relatively fast.
This plugin switches over to bcrypt, which is the algorithm recommended by phpass, and is a much better option for password 
storage because it is much slower to produce. This makes it much harder for an attacker who’s managed to access your hashed 
passwords to obtain plain text passwords by brute-forcing, or by trying passwords from a dictionary.
Note: this plugin requires PHP 5.3.0 or newer
Be aware that if you use this plugin and then move to a host that does not support bcrypt, you will need to reset any user 
account that you want to log in with.

wp-bcrypt

wp bcrypt switches WordPress's password hashes from MD5 to bcrypt, making it harder for them to be brute-forced if they are leaked.

Rik Lewis

bettersecurity

This plugin sets a default minimum password length of 10 characters, to ensure that passwords are suitably long that they are hard to guess. However, it does not insist on any complexity rules, such as digits and special characters, as length is the most important thing when making a password hard to guess.
This plugin uses Troy Hunt’s <a href="https://haveibeenpwned.com/Passwords" rel="nofollow ugc">Pwned Passwords API</a> in order to check a user’s potential password against a corpus of breached passwords.
The password itself is never sent to any third party, only a partial hash is sent. This means that the password entered will always be private.
As an added bonus, this plugin also upgrades the hashing algorithm used when storing your password in the database. This is a secure one-way hash created using the <a href="https://en.wikipedia.org/wiki/Bcrypt" rel="nofollow ugc">Bcrypt</a> or <a href="https://en.wikipedia.org/wiki/Argon2" rel="nofollow ugc">Argon2</a> algorithm.

Better Passwords

I use this plugin on all of my sites - it not only checks if a used password is included in a haveibeenpwned.com leak, but also forces Wordpress to use more secure hashing algorithms for saving passwords. Highly recommended!

Recommended plugin


Perfect for my needs, as it doesn't attempt to enforce overly complex password rules, it just allows me to set a minimum length, and checks new passwords against Have I Been Pwned to make sure it's not been previously included in a breach. Can also store passwords using stronger hashing algorithms than the WordPress default.


Perfect for my needs

Stop use of a bad passwords, including those in the Have I Been Pwned? breached password database

wp-bcrypt vs Better Passwords