Geli

To encrypt a FreeBSD system using Geli (FreeBSD's disk encryption mechanism), follow these steps:

Prepare the FreeBSD Installation:

Start by booting into the FreeBSD installation media.
Proceed through the installation process until you reach the disk partitioning step.

 Partition Your Disk:

Select the disk you want to install FreeBSD on.
Create partitions as needed. Typically, you'll want a separate partition for /boot and the rest for the root filesystem .

Encrypt the Partitions:

FreeBSD's Geli (GEOM-based Disk Encryption Layer) provides disk encryption features for data at rest on FreeBSD systems. Here are some of its key features:

1. Full Disk Encryption: Geli allows you to encrypt entire disks or individual partitions, ensuring that all data on the disk is encrypted.

2. Encryption Algorithms: Geli supports various encryption algorithms, including AES (Advanced Encryption Standard) in different key sizes (128, 192, and 256 bits). You can choose the algorithm and key size according to your security requirements.