Copyright Protected is a WordPress plugin that automatically displays a copyright statement that contains the current copyright year.

Copyright Protected

Displays a copyright statement with the current year. Requires PHP.

Marcello Scacchetti

Display on password protected pages/posts a custom specified text instead of the WordPress default one.
A few notes about the plugin: 
* Actually doesn’t support i18n, should be supported in the next release 
* Actually doesn’t support message multilingual message translation

Custom Password Protected Text

Custom text message for password protected pages and posts

Copyright Protected vs Custom Password Protected Text