AN 759: Using Secure Boot in Intel® Arria® 10 SoC Devices

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ID 683060
Date 3/29/2021
Public
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Boot Image Authentication

During a secure boot, the first-stage boot loader (in the boot ROM) uses the root public key and associated key chain to authenticate the second-stage boot loader image as follows:
  1. Determine the configuration settings of the device (by reading the fuse values)
  2. Attempt to authenticate the boot image, using the root public key type from the configuration settings
Figure 7. Secure Authentication Using Key Types

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