IT 4100 : File Systems and Storage Technologies

Windows

Windows - Shadow copies

Kind of like the snapshot feature
allows you to rollback to an earlier image
Navigate to properties of a volume
- shadow copies
- previous versions

Windows - EFS

EFS is a folder-level encryption system (or encrypt a single file).
Only supported on ntfs
If you move files to a different drive that isn’t NTFS, encryption will be lost
operates in the background and is transparent to users and applications
only encrypts data at rest
operates on a per-user basis
symmetric key encryption

Windows - EFS

When a file or folder is encrypted, the FEK (file encryption key) is stored in the encrypted file’s header and the public key is stored with the user. This symmetric encryption gives EFS a distinct time advantage over its asymmetric counterpart by encrypting files a thousand times faster.

you should backup your key

Windows - Bitlocker

Bitlocker is a partition level encryption system
cannot encrypt files and folders separately like EFS
can encrypt the volume regardless if it is a windows os or data volume
can require pin or usb startup key
can be combined with EFS