I think it is less conspicuous to stuff encrypted data into unallocated space of ordinary filesystem with copious amount of redundancy to handle corruption caus

I think it is less conspicuous to stuff encrypted data into unallocated space of ordinary filesystem with copious amount of redundancy to handle corruption caused by unaware filesystem, like Artifice: https://www.usenix.org/system/files/foci19-paper_barker.pdf https://www.usenix.org/system/files/foci19-paper_barker.pdf