GBDE or GEOM Based Disk Encryption is a FreeBSD block device-layer disk encryption that uses 128-bit AES designed and implemented by Poul-Henning Kamp and Network Associates Inc.
A more efficient implementation of FreeBSD GEOM based Disk Encryption. GELI was later written later by Pawel Jakub Dawidek.
- FreeBSD official website
- Wikipedia: GBDE
- man page: gbde(8)
- GBDE - GEOM Based Disk Encryption, by Poul-Henning Kamp