[mioelnir]

I am well aware of all of that. But all the zfs send/recv options can by their very definition not have the full disk encryption problem hinted at in the comment I replied to.

Also, if it is easier to take your NAS offline and apart to chuck the disks into your desktop (compared exporting it over the network), then your NAS is too small. What you were looking for is a Laptop.

Which leaves abusing the zpool on a memory stick as data interchange format. Most likely with copies=1, so you have to add some par2 files anyway, at which point you could simply put them on figuratively any other filesystem out there. And encrypt them with gpg/openssl etc. That way I would also not have to run a potentially maliciously crafted filesystem within my kernel.