https://devzone.nordicsemi.com/f/nordic-q-a/127878/how-to-determine-if-the-firmware-is-encryptedI used binwalk to analyze the zephyr.signed.encrypted.bin file generated by the routine mcuboot_with_encryption. I found that the firmware was not encrypted but merely compressed.The analysis results are as follows. DECIMAL HEXADECIMAL DESCRIPTION en-USTelligent Community 13Wed, 22 Apr 2026 07:09:46 GMThttps://devzone.nordicsemi.com/thread/565277?ContentTypeID=1Wed, 22 Apr 2026 07:09:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:60d5e486-e780-4199-81dc-5ca298197214Turbo J<p>The bootloader can&#39;t unzip. Thus its not compressed and then encrypted, its encrypted and&nbsp;<em>then</em> compressed.</p> <p>You have to analyse the decompressed data in order to check whether an image is encrypted.</p><div style="clear:both;"></div>