faazshift

Enscrypt replaces wordpress authentication protocols with a mechanism that uses the far more secure scrypt hashing algorithm.
Scrypt is a superior hashing algorithm with configurable CPU and memory parameters. As such, when properly configured, it takes long enough and is secure enough to be highly resistant to brute-force attacks.
Enscrypt can be enabled and disabled at-will without interfering with the built-in WordPress authentication mechanism.

Enscrypt

Enscrypt replaces WordPress authentication protocols with a mechanism that uses the far more secure scrypt hashing algorithm.

Yeora

The “MB Challenge response authentication” plugin extends the 
default WordPress authentication with a challenge response authentication. 
This ensures that passwords during login are no longer stored in the 
clear text during the login process.
Via a menu item in the administration you can also set whether the challenge response authentication should be enforced or not. If challenge response authentication is not enforced 
the default WordPress authentication is allowed as fallback. 
This is the case if a user cannot hash on the client side.
Furthermore, the default WordPress hasher is overridden and PHP native functions like password_hash and password_verify are used.
<h3>Credits</h3>
Special thanks to the developers of the 
bcrypt.js library https://github.com/dcodeIO/bcrypt.js. 
The library is used for client-side hashing.

MB Challenge response authentication

This plugin implements challenge response authentication. In addition, the WordPress hasher is replaced by native PHP libraries.

Enscrypt vs MB Challenge response authentication