Julio Potier

<ul>
<li>
PLEASE CHECK YOUR EMAIL SETTINGS IN YOUR PROFILE BEFORE LOGOUT THE FIRST TIME AND WAIT FOR THE MAIL CONTAINING THE SECURE CARD. THANK YOU –
</li>
<li>
A new field is added below the password one.
</li>
<li>It requires a new code, this code is on a “MSL Secure Card” (png or html table).</li>
<li>This card contains 64 codes, each code contains 4 chars. You have to print it!</li>
<li>Now when someone wants to log on any account, even if he knows the password, he can not use it without the code.</li>
</ul>
This kind of authentication is called “Strong Authentication”, strong authentication is associated with at least two-factor authentication. 
Your usual password is the first and only factor, this plugin adds an external factor : a MSL Secure Card. 
Now, you have 2 secure factors to log in.
When someone wants to log in any account, he has to fill the username, password and now a “MSL Code” field. 
This code is printed on a card (you have to print it) and contains a code from A1 to H8. 
Without this code, he can not log in!
The codes are not stored in your DB, all codes are hashed like your password is. So, the codes are as secure as your password is.
Every blog which needs to improve its login’s security needs this plugin.

More Secure Login

This is a strong authentication plugin. You have to fill a second field, kind of password but this one comes from a printed card you own (FR/EN).

enomoto celtislab

Simple, easy, lightweight download manager with password protection
<h3>Features</h3>
This download management plugin is designed to be light and easy to use.
<ol>
<li>Basically all downloads are password protected. This also prevents downloads by bots etc.</li>
<li>A single shortcode and download URL are created as the download data.</li>
<li>All types of files for download can be uploaded with the Media Uploader if the user has administrative privileges.</li>
</ol>
Functions added by addons
<ol>
<li>Generate a password with an expiration date.</li>
<li>Information and Update manager for WordPress themes and plugins not registered on the WordPress official website.</li>
</ol>
<h3>How to use</h3>
If you want to download from your own site’s posting page, etc., write the shortcode [celtisdl_download id=”123″] in the content. 
If you want to send download information via email, etc., send the download URL and password to the recipient.
There is no functionality to style the download button in various ways, but you can use filter hooks to change the style of the button. 
Alternatively, if you are using a block editor, you can set the download URL in the link of the button block and set the button style in the block editor.
The plugin requires a download password, but there are two ways to bypass this requirement.
<ol>
<li>For example, if you want to download from a page such as a checkout page without requiring a password, you can register the URL of that checkout page and download without entering a password.</li>
<li>Logged-in users can download without entering a password if they have the registered user capability.</li>
</ol>
Please see the following page for details
<a href="https://celtislab.net/en/wp-plugin-celtis-simple-download/" rel="nofollow ugc">Documentation</a>
<h3>customize</h3>
Filter hooks for main customization
shortcode download button custom style filter hook 
apply_filters( ‘celtisdl_download_button_custom’, $html, $post )
password form custom style filter hook 
apply_filters( ‘celtisdl_password_form_custom’, $output, $post )
log view custom filter hook 
apply_filters( ‘celtisdl_stat_content_custom’, $shtml, $stat ) 
apply_filters( ‘celtisdl_log_content_custom’, $shtml, $log )

Simple Download with password

Simple, easy, lightweight download manager with password protection

More Secure Login vs Simple Download with password