I have a question related to bitstream encryption using eFUSE option. If my FPGA has bitstream encryption key stored in the eFUSE, how Vivado will know the encryption key when generating new encrypted bitstream? Does Vivado has a method to readback the key from eFUSE and use it for encryption?
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How can Vivado know the encryption key?
Vivado uses an
NKYfile that is generated when setting the encryption key. For instance when executingAn NKY file will be create, whose format is:
For example: (top.nky)
Can Vivado read back the key?
Quoting XAPP1239