Benefit of PBA (pre-boot authentication)

  • Article ID: 109368
  • Updated: 29 May 2009


Product
Sophos SafeGuard Disk Encryption 4.60

Client OS

Windows 2000 Professional SP4, Windows XP SP3

Server OS

None

Question

What is the PBA (pre-boot authentication) good for?

Answer

When you switch on your PC, the BIOS accesses the harddisk. Before any operating system is loaded or booted, the Sophos SafeGuard Disk Encryption Authentication Screen is displayed on the screen. The PC cannot be booted up without a valid login (the user has to authenticate before the PC is booted). Invalid logins cause rapidly increasing response times in the PBA screen.

By forcing the user to authenticate, Sophos SafeGuard Disk Encryption prevents from accessing the Windows registry or the file system by the use of appropriate tools or booting from CD. It also prevents malicious users from trying to install any kind of Trojan horse or other form of attack. Thus, it can be ensured that user passwords and data cannot be spied out or manipulated by the help of other tools.


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