Overview Of Design; Supported Keyboard Layouts In Preboot And Drive Encryption - HP 2230s - Compaq Business Notebook Manuallines

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Overview of Design

The goal of the HP ProtectTools implementation is to use password filters to
reject passwords that might lock out a user at the Preboot BIOS level or Drive
Encryption level. The ProtectTools Security Manager will be responsible to
reject a user password at setup or password change time. A password can be
acceptable for the Windows password, but if allowed may cause a lock out at
Preboot BIOS or Drive Encryption level. These passwords will therefore be
rejected by the HP ProtectTools password filter.
The BIOS Preboot and Drive Encryption each preloads tables of key mapping
from Scan Code to Unicode based on the supported keyboard layout. (see table
Figure ‐1 below). When the user enters the password before OS starts, the BIOS
or the Drive Encryption software will convert the key strokes to the correct
Unicode based on key mapping tables and then compare the password with the
one stored. The ProtectTools Security Manager will pass the keyboard layout
information to BIOS Preboot and Drive Encryption.
In addition, the BIOS Preboot and Drive Encryption may implement additional
methods to assist password entering. E.g. In 2008 Business Notebook BIOS, a
soft keyboard will be loaded to enter glyphs directly with the mouse instead of
pressing a key on the keyboards if a user fails to type their password correctly.
The Drive Encryption software allows the user to dynamically load the
keyboard layouts.
4. Supported Keyboard Layouts in Preboot and Drive
Encryption
The Preboot BIOS and Drive Encryption support a subset of Windows' keyboard
layouts due to space and other limitations. Below is a list (Figure 1) of
supported keyboards in Preboot and Drive Encryption. In some cases, the
common name for a particular keyboard layout differs in Windows Vista from
the HP designation. In order to clarify, we provide both names.
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