Install NCALayer software to run digital signature keys. 

NCALayer software enables using digital signature of the NCA of the RoK in web applications and operating Java in browsers. NCALayer capabilities might be extended by installation of additional modules provided by third-party developers. 
To run NCALayer you should perform preliminary setup of your computer. PC configurations should comply with minimal requirements.

User Guidelines for NCALayer installation Open

Minimal Requirements for User’s PC:
Browser: Internet Explorer 10+, Firefox 4+, Opera 10+, Google Chrome 4+, Safari 5+;
Operating System: Windows 7 and above, Mac OS X 10.11 and above, any versions of ОС GNU Linux with Gnome graphic environment of version 3 and above.

NB! Before running a browser or portal on which utilization of digital signature is to be performed, you need to run the application. You can select an autostart for the application for convenience.