geli(8) is one of the most powerful block device-layer disk encryption system available in FreeBSD, which protects our data against cold storage attacks. geli(8) encrypts our data so that a skilled intruder cannot see sensitive documents, or modify our data without us noticing that a modification has taken place.
Link: https://github.com/DtxdF/AppJail/wiki/geli
Link: https://github.com/DtxdF/AppJail/wiki/geli