Encrypted overlay filesystem written in Go. More information: https://github.com/rfjakob/gocryptfs.
gocryptfs -init path/to/cipher_dir
gocryptfs path/to/cipher_dir path/to/mount_point
gocryptfs --masterkey path/to/cipher_dir path/to/mount_point
gocryptfs --passwd path/to/cipher_dir
gocryptfs --reverse path/to/plain_dir path/to/cipher_dir