How can KDE Kontakt be protected from unauthorized access to user data?

Question

linux

Good afternoon!
Found an excellent program Kontakt , which satisfies all my needs for planning and organizing personal activities. But for some reason, the access of other users is not limited in any way (if someone copies the export file from me). Why is this done? maybe I missed some settings?
Is there any way (other than paranoid deletion of all user files after working in the system) to restrict access to user data?
Or maybe there is some similar tool but with protection?
Thanks to all!

Answer 1

Encrypt the /home partition