Dell D31M Owner's Manual page 134

Table 39. System setup options—Security menu (continued)
Security
SHA-256
Clear
PPI ByPass for Clear Commands
TPM State
Intel Platform Trust Technology (PTT) Intel PTT is a firmware-based Trusted Platform Module (fTPM) device that is
PTT On
Physical Presence Interface (PPI) Bypass
for Clear Commands
Clear
Chassis intrusion
Chassis Intrusion Detection
134 BIOS setup
Allows you control the usage of SHA-256 by TPM. When enabled, the BIOS
and TPM use the SHA-256 hash algorithm to extend measurements into the
TPM PCRs during BIOS boot. When disabled, the BIOS and TPM use the
SHA-1 hash algorithm to extend measurements into the TPM PCRs during
BIOS boot.
By default, the SHA-256 option is enabled.
For additional security, Dell Technologies recommends keeping the SHA-256
option enabled.
When enabled, the Clear option clears information stored in the TPM after
exiting the system's BIOS. This option returns to disabled state when the
system restarts.
By default, the Clear option is disabled.
Dell Technologies recommends enabling the Clear option only when TPM data
is required to be cleared.
Controls the TPM Physical Presence Interface (PPI).
By default, the PPI ByPass for clear Commands option is disabled.
Enables or disables the Trusted Platform Module (TPM). This is the normal
operating state for the Trusted Platform Module (TPM) when you want to use
its complete array of capabilities.
By default, the TPM State option is enabled.
part of Intel chipsets. It provides credential storage and key management that
can replace the equivalent functionality of a discrete TPM chip.
Enables or disables the Intel PTT option.
By default, the PTT On option is enabled.
For additional security, Dell Technologies recommends keeping the PTT On
option enabled.
The PPI Bypass for Clear Commands option allows the operating system to
manage certain aspects of PTT. When enabled, you are not prompted to
confirm changes to the PTT configuration.
By default, the PPI Bypass for Clear Commands option is disabled.
For additional security, Dell Technologies recommends keeping the PPI
Bypass for Clear Commands option disabled.
When enabled, the Clear option clears the information stored in the PTT fTPM
after exiting the system's BIOS. This option returns to disabled state when the
system restarts.
By default, the Clear option is disabled.
Dell Technologies recommends enabling the Clear option only when PTT fTPM
data needs to be cleared.
Allows you to control the chassis intrusion feature. This feature notifies the
user when the base cover has been removed from the computer.
When set to Enabled, a notification is displayed on the next boot and the
event is logged in the BIOS Events log.
When set to On-Silent, the event is logged in the BIOS Events log, but no
notification is displayed.