See the Steps to Enable Tamper-Protection Bit Programming section of the AN556 documentation.
AN 556: Using the Design Security Features in Intel FPGAs
https://docs.altera.com/r/docs/683269/current/an-556-using-the-design-security-features-in-fpgas/using-the-design-security-features-in-intel-fpgas
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Category: Programming/Configuration
Tools: Quartus® Prime
Devices: -