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Encrypted firmware via JTAG

Question asked by Giuseppe Scarpi on Jan 7, 2019
Latest reply on Jan 8, 2019 by Yuri Muhin
Branched from an earlier discussion

Hi Yuri,

as Luis, we need to work with encrypted images, in two modes:

 

1) first programming (load image to QSPI, burn fuses/keys etc.)

2) on-the-fied upgrade (new firmware received via ETH).

 

According to your comment, we need USB or UART1 and the MFG tool.

On the other hand, the comment is four months old, so I would like to check.

Can you confirm that we cannot write an encrypted image via JTAG?

What if we just want a SIGNED image?

 

Moreover, what is the best method to execute the on-the-field upgrade?

 

Thanks

Giuseppe

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