Hello,
The MFG (in flashloader package) may be used also to program an encrypted image.
Use app note AN12079 (How to use i.MXRT Security Boot) for more details.
https://www.nxp.com/webapp/sps/download/mod_download.jsp?colCode=AN12079&appType=moderated&Parent_no...
Have a great day,
Yuri
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