marchfeld

Currently supported password encryptions are mysql OLD_PASSWORD and mysql PASSWORD, so if you have migrate from application with user’s passwords encrypted with those two methods it will enable them to login.
This is useful if you don’t want to force all existing users to reset password.

Custom password encryption

Custom password encryption enable to login for imported users with other password encryption then the default md5 encryption.

Subhransu Sekhar

This plugin uses the jCryption plugin (http://old.jcryption.org) to encrypt any form submission in WordPress using 265-bit public/private key encryption.For example, you can use it to encrypt the login and registration form, so a user’s passwords are never transmitted in clear text.

WP Form Encryption

Encrypt any form submission in Wordpress using 265-bit public/private key encryption.

Custom password encryption vs WP Form Encryption