NUCUTA

‘Nucuta Password Protect’ is a security plugin which password protects wordpress websites. Requires PHP 5.6.30 or Above.
The plugin uses a custom password, and therefore it’s completely independant from default wordpress password uses to access to the admin area of the site. Users can be restricted to access the site either based on their user group or altogether.
The available user groups are “editor”, “author”, “contributor”, “subscriber”. if a particular group is excluded from protecting from the custom password, users belong to that group won’t be asked the password. Clicking on the log off button logs off from the entire website, meaning the user has to enter the password to access the site again. By default, all users (both guests and registered logged in users) are required to enter the password before accessing the site, but by configuring, logged in users can be excluded. The plugins blocks not only visitors, but also bots, spiders, and all kind of crawlers.
Custom message can be set for both logged in/non-logged in users, A separate login page is provided to login purpose. Password is salted before storing in the database, and therefore security is top notch. The full documentation, and how to use guide can be found at this location. <a href="https://nucuta.com/how-to-password-protect-wordpress-site/" rel="nofollow ugc">Documentation, Help and Tutorial</a>

Nucuta Password Protect

works even on php 7

Secure your wordpress site with a password. Useful for private blogs.

Mike Hickcox

Set the time allowed before a password must be again entered for a password-protected post or page. Also, enhance the page password form. 
By default, when you password-protect a page or post in WordPress, a user can get back into that page, without a password, for 10 days. 
With this plugin, you can set your own duration, and allow for better protection of password-protected pages. 
* This plugin allows you to easily change the lifetime of that cookie. 
* Set it to any combination of hours, minutes, and seconds. 
* You can even set it for zero hours, zero minutes, and zero seconds, so users always must use the password to access the page. 
* The page password form is also enhanced for a better look in the website, and shows the user the length of time allowed before a password will again be required. 
* If you create pages with a builder, that system may overwrite the password page created by this plugin, but the times you set will still work on your website.

MC Protected Page Upgrade

Set the time allowed before a password must be again entered for a password-protected post or page. Also enhances the page password form.

Nucuta Password Protect vs MC Protected Page Upgrade