Acronis Server Cloud Backup - User Guide - Manual (Page 40)

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This option becomes available if you have selected the previous parameter, Back up
sector-by-sector. By default, while performing sector-by-sector backup, unallocated space is not
included into the backup file. Enabling this option will include all unallocated disk space into the
backup.
2.8.6 Backup protection
A backup file can be password-protected. By default, there is no password protection for backups.
To protect the backup:

Enter the password for the backup into the Password field. A password should consist of at least
eight symbols and contain both letters (in upper and lower cases preferably) and numbers to
make it more difficult to guess.

Retype the previously entered password into the Confirm field.

To increase the security of your confidential data, you can encrypt the backup with strong
industry-standard AES (Advanced Encryption Standard) cryptographic algorithm. AES is available
with three key lengths – 128, 192 and 256 bits to balance performance and protection as desired.
The 128-bit encryption key is sufficient for most applications. The longer the key, the more
secure your data. However, the 192 and 256-bit long keys significantly slow down the backup
process.
If you want to use AES encryption, choose one of the following keys:

AES 128 - to use 128-bit encryption key

AES 192 - to use 192-bit encryption key

AES 256 - to use 256-bit encryption key
If you do not want to encrypt the backup and only want to protect a backup with a password,
select None.
Having specified the backup protection settings, click OK.
Note that you cannot change the password of a password-protected backup after the backup was created.
If you try to recover data from a password-protected backup, the program will ask for the password in a special
window, allowing access only to authorized users.
2.8.7 Pre/Post commands for backup
You can specify commands (or even batch files) that will be automatically executed before and after
the backup procedure.
For example, you may want to start/stop certain Windows processes, or check your data before
starting backup.
To specify commands (batch files):

Select a command to be executed before the backup process starts in the Pre-command field. To
create a new command or select a new batch file, click the Edit button.

Select a command to be executed after the backup process ends in the Post-command field. To
create a new command or select a new batch file, click the Edit button.