hauxh

This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string] 
Specify the key in a custom value called “key” with the [string] or use the built in widget.
Stable version of the plugin are pushed to the WordPress repository, 
but the latest version of the plugin can be found at: 
https://bitbucket.org/excion/wpkeyme/
Issues/Bugs: https://bitbucket.org/excion/wpkeyme/issues

WPKeyMe

This plugin allows you to require a secret key that is passed via the URL: http://example.com/post-title/?key=[string]

Shokrino Team

after activating the plugin you can go to kalamatino words list and add your custom text for replacement.
kalamatino name made from “kalamat” word that means “words” in persian.
you can add words to the plugin’s list to start replace texts 
1. words list on kalamatino

Kalamatino

You can easily replace a letter or every text with your custom text with kalamatino.

WPKeyMe vs Kalamatino