alt Hacker News>You cannot send someone a LUKS volume to decrypt one file, and backups of a mounted encrypted volume are plaintext unless you add another layer.
Veracrypt, and I'm sure others, allow you to do exactly this. You can create a disk image that lives in a file (like a .iso or .img) and mount/unmount it, share it, etc.
That’s not what they said. They’re saying you often want to give someone a specific file from a disk, rather than the whole set of files.