How can you prevent encrypted folders that you created in disc utility from being deleted?

How can you prevent encrypted folders that you created in disc utility from being deleted?

bibst wrote:
How can you prevent encrypted folders that you created in disc utility
You cannot create encrypted folders in, or encrypt folders with, Disk Utility.
You can create with Disk Utility encrypted disk images from folders. I assume that's what you mean.
The proper way to do it is by setting the immutable bit. Read here
<http://www.thexlab.com/faqs/immutableflags.html>
about the immutable bits (and the trouble they sometimes create).
The user immutable bit (uchg) is the same as the Finder lock, as described above by X423424X. It's a weak lock, with only a warning.
The system immutable bit (schg) is more powerful. Once is set, the item cannot be deleted in Finder (even though Finder will ask for your password and may give you the impression that it can trash it; it will end with an error).
I set it in Terminal, thus
$ sudo chflags schg my_encrypted_disk_image
and unset it also in Terminal
$ sudo chflags noschg my_encrypted_disk_image
(Note that, when you unset the system immutable bit, the change won't be reflected immediately in Finder, but the item can be trashed nevertheless.)

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