Dell XPS 13 9340 Owners Manual - Page 84

Table 35. System setup options-Power menu continued, Table 36. System setup options-Security menu

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Table 35. System setup options-Power menu (continued) Power Power On Lid Open When enabled, it allows the computer to turn on from the off state whenever the lid is opened. By default, the Power On Lid Open option is enabled. Intel Speed Shift Technology Enables or disables the Intel Speed Shift Technology support. When enabled, the operating system selects the appropriate processor performance automatically. By default, the Intel Speed Shift Technology option is enabled. Table 36. System setup options-Security menu Security TPM 2.0 Security TPM 2.0 Security On Allows you to enable or disable TPM. By default, the TPM 2.0 Security On option is enabled. For additional security, Dell Technologies recommends keeping TPM On enabled to allow these security technologies to fully function. Attestation Enable The Attestation Enable option controls the endorsement hierarchy of TPM. Disabling the Attestation Enable option prevents TPM from being used to digitally sign certificates. By default, the Attestation Enable option is enabled. For additional security, Dell Technologies recommends keeping the Attestation Enable option enabled. NOTE: When disabled, this feature may cause compatibility issues or loss of functionality in some operating systems. Key Storage Enable The Key Storage Enable option controls the storage hierarchy of TPM, which is used to store digital keys. Disabling the Key Storage Enable option restricts the ability of TPM to store owner's data. By default, the Key Storage Enable option is enabled. For additional security, Dell Technologies recommends keeping the Key Storage Enable option enabled. NOTE: When disabled, this feature may cause compatibility issues or loss of functionality in some operating systems. SHA-256 Allows you to control the hashing algorithm that is used by the TPM. When enabled, the TPM uses the SHA-256 hashing algorithm. When disabled, the TPM uses the SHA-1 hash algorithm. By default, the SHA-256 option is enabled. For additional security, Dell Technologies recommends keeping the SHA-256 option enabled. Clear When enabled, the Clear option clears information that is stored in the TPM after exiting the computer's BIOS. This option returns to the disabled state when the computer restarts. By default, the Clear option is disabled. Dell Technologies recommends enabling the Clear option only when TPM data is required to be cleared. Physical Presence Interface (PPI) Bypass for Clear Commands 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. 84 BIOS Setup

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Table 35. System setup options—Power menu (continued)
Power
Power On Lid Open
When enabled, it allows the computer to turn on from the off state whenever the
lid is opened.
By default, the
Power On Lid Open
option is enabled.
Intel Speed Shift Technology
Enables or disables the Intel Speed Shift Technology support. When enabled, the
operating system selects the appropriate processor performance automatically.
By default, the
Intel Speed Shift Technology
option is enabled.
Table 36. System setup options—Security menu 
Security
TPM 2.0 Security
TPM 2.0 Security On
Allows you to enable or disable TPM.
By default, the
TPM 2.0 Security On
option is enabled.
For additional security, Dell Technologies recommends keeping
TPM On
enabled
to allow these security technologies to fully function.
Attestation Enable
The
Attestation Enable
option controls the endorsement hierarchy of TPM.
Disabling the
Attestation Enable
option prevents TPM from being used to
digitally sign certificates.
By default, the
Attestation Enable
option is enabled.
For additional security, Dell Technologies recommends keeping the
Attestation
Enable
option enabled.
NOTE:
When disabled, this feature may cause compatibility issues or loss of
functionality in some operating systems.
Key Storage Enable
The
Key Storage Enable
option controls the storage hierarchy of TPM, which is
used to store digital keys. Disabling the
Key Storage Enable
option restricts the
ability of TPM to store owner's data.
By default, the
Key Storage Enable
option is enabled.
For additional security, Dell Technologies recommends keeping the
Key Storage
Enable
option enabled.
NOTE:
When disabled, this feature may cause compatibility issues or loss of
functionality in some operating systems.
SHA-256
Allows you to control the hashing algorithm that is used by the TPM. When
enabled, the TPM uses the SHA-256 hashing algorithm. When disabled, the TPM
uses the SHA-1 hash algorithm.
By default, the
SHA-256
option is enabled.
For additional security, Dell Technologies recommends keeping the
SHA-256
option enabled.
Clear
When enabled, the
Clear
option clears information that is stored in the TPM
after exiting the computer's BIOS. This option returns to the disabled state when
the computer restarts.
By default, the
Clear
option is disabled.
Dell Technologies recommends enabling the
Clear
option only when TPM data is
required to be cleared.
Physical Presence Interface (PPI) Bypass
for Clear Commands
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.
84
BIOS Setup