Lenovo ThinkPad T450, Руководство пользователя

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Table 4. Security menu items (continued)
Menu item Submenu item Value Comments
Set Minimum Length • Disabled
• x characters
(4≤x≤12)
Specify a minimum length for power-on
passwords and hard disk passwords. If you
set the supervisor password and specify a
minimum length for passwords, no one but you
can change the length.
Power-On Password
• Disabled
• Enabled
For more information, see “Power-on password”
on page 63.
Hard Disk x
Password • Disabled
• Enabled
For more information, see “Hard disk
passwords” on page 65.
Note: Hard Disk 1 means the hard disk drive is
built into your computer.
Predesktop
Authentication • Disabled
• Enabled
Enable or disable fingerprint authentication
before the operating system is loaded.
Reader Priority • External ➙
Internal
• Internal Only
If External ➙ Internal is selected, an external
fingerprint reader is used if attached. Otherwise,
an internal fingerprint reader is used. If
Internal
Only is selected, an internal fingerprint reader
is used.
Security Mode • Normal
• High
If fingerprint authentication fails, you still can
start the computer by entering a password. If
you have selected
Normal , enter a power-on
password or a supervisor password; if you have
selected
High , enter a supervisor password.
Password
Authentication • Disabled
• Enabled
Enable or disable password authentication. This
item is available when high security mode is
selected.
Fingerprint
Reset Fingerprint
Data • Enter
This option is used to erase all fingerprint data
stored in the fingerprint reader and reset settings
to the factory state. As a result, any power-on
security features previously enabled will not be
able to work until they are re-enabled in the
fingerprint software.
Security Chip
Selection • Discrete TPM
• Intel PTT
If you select Discrete TPM , you can use a
discrete TPM chip with TPM 1.2 mode. If you
select
Intel PTT , you can use Intel Platform
Trusted technology (PTT) with TPM 2.0 mode.
If you change from Intel PTT to Discrete TPM ,
a message pops up “All encryption keys will be
cleared in the security chip. Do you really want
to continue?” If you want to continue, select
Yes .
If you change from Discrete TPM to Intel PTT ,
a message pops up “All encryption keys will be
cleared in the security chip. Intel AMT and Intel
TXT are disabled when the security chip is set
to Intel PTT. Do you really want to continue?” If
you want to continue, select
Yes .
Note: Intel PTT can be used with Windows 8.1
or later operating system.
Security Chip
Chapter 6
.
Advanced configuration
85