cppcryptfs is based on the design of gocryptfs, an encrypted overlay filesystem written in Go.

cppcryptfs is an implementation of the gocryptfs filesystem in C++ for Windows. cppcryptfs is compatible with gocryptfs. Filesystems created with one can generally be mounted (and synced) with the other.

Found on https://infosec-handbook.eu/recommendations/ via https://nuetzlich.net/gocryptfs/