This is cryptographic disk driver for FreeBSD. It provides transparent encryption and decryption of selected devices. It is based on vn(4).
Follow Cryptographic disk driver for FreeBSD
DigitalOcean's predictable format removes infrastructure friction and allows developers more time to build software customers love. Easily deploy, manage, and scale applications of any size. DigitalOcean also provides the support you need with hundreds of in-depth tutorials and an active online community.