It seems I wasn’t clear as most people misunderstood me.
But, to give a very precise example; say
I had a folder called ~/some/folder.
It was on an encrypted drive.
And I had done additional work to encrypt the folder again.
And say, I used chattr, chmod or chown or similar utilities that remove access as long as one doesn’t have elevated privileges.
And say, I had done whatever (additional thing) mentioned in your comment.
Then, what prevents whosoever, to copy that file through cloning the complete disk?
Even if they’re not able to get past the password, it will be found on the cloned disk. SO, basically, I ask for some method that prevents the file to even be copied through a disk clone. I don’t care that it has three passwords protecting it. What I want is for the disk clone (or whatever sophisticated copy/mv/cut or whatsoever utility exists) to somehow fail while trying to attempt the action on the protected files.