Forum Discussion

KKlei5's avatar
KKlei5
Icon for New Contributor rankNew Contributor
6 years ago

How do I program the KAK (Key Authorization Key) in User Access Fuses (UAF).

The background on this is the KAK, sometimes referred to Root Public Key, or the SHA256 of the public key, is used by the ROM bootloader to authenticate the 2nd stage bootloader. This is done by chec...
KKlei5's avatar
KKlei5
Icon for New Contributor rankNew Contributor
6 years ago

Thank you for the reply.

I already know how to program the AES key for securing the FPGA programming file. As I mentioned, it is done with a .ekp file just as your referenced app note indicates. My question was how to program the KAK / Root Public Key / SHA256 of the public key, which is used to authenticate the 2nd stage boot loader. Can you point out which section of this app note describes the KAK / Root Public Key / SHA256 of the public key, and specifically how it is programmed, such as by .ekp file or other?