More Security Options Dialog Box

Table 1. More Security Options Dialog Box. For Stratix® 10 devices, specifies additional configuration bitstream physical security settings. To access these settings, click Assignments > Device > Device and Pin Options > Security > More Settings button. Disabled options are unavailable for the current device or configuration mode.
Option Description Values
Disable JTAG Disables JTAG command and configuration of the device. Setting this eliminates JTAG as mode of attack, but also eliminates boundary scan functionality.
  • Off—inactive
  • On—active until wipe of containing design
  • On sticky—active until next POR
  • On check—checks for corresponding blown fuse
Force SDM clock to internal oscillator Disables an external clock source for the SDM. The SDM must use the internal oscillator. Using an internal oscillator is more secure than allowing an external clock source for configuration.
Force encryption key update Specifies that the encryption key must update by the frequency that you specify for the Encryption update ratio option. The default ration value is 31:1. Encryption supports up to 20 intermediate keys.
Disable virtual eFuses Disables the eFuse virtual programming capability.
Lock security eFuses Causes eFuse failure if the eFuse CRC does not match the calculated value.
Disable HPS debug Disables debugging through the JTAG interface to access the HPS.
Disable encryption key in eFuses Specifies that the device cannot use an AES key stored in eFuses. Rather, you can provides an extra level of security by storing the AES key in BBRAM.
Disable encryption key in BBRAM Specifies that the device cannot use AES key stored in BBRAM. Rather, you can provides an extra level of security when you store the AES key in eFuses.