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
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
Windows - EFS