MCUBoot downgrade prevention with nRF52840https://devzone.nordicsemi.com/f/nordic-q-a/118583/mcuboot-downgrade-prevention-with-nrf52840I have MCU boot running successfully in my project using NCS 2.8.0 and sysbuild. I&#39;m now trying to add hardware downgrade protection as described here: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/bootloaders_dfu/mcuboot_nsib/bootloader_downgrade_protectionen-USTelligent Community 13Tue, 04 Feb 2025 07:13:06 GMTRE: MCUBoot downgrade prevention with nRF52840https://devzone.nordicsemi.com/thread/521216?ContentTypeID=1Tue, 04 Feb 2025 07:13:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b4fb9d9b-7215-4585-9937-65c5fef47cccVidar Berg<p>Hello,</p> <p>Unfortunately, HW dowgrade protection is currently only available on the nRF53 and nRF91 series:&nbsp;<a href="https://github.com/nrfconnect/sdk-nrf/blob/2116d91350901ecd55b7a3f4d1f4fe70a9dd2cbc/sysbuild/Kconfig.mcuboot#L17">https://github.com/nrfconnect/sdk-nrf/blob/2116d91350901ecd55b7a3f4d1f4fe70a9dd2cbc/sysbuild/Kconfig.mcuboot#L17</a>. There should be Kconfig warnings in the build log to inform that the symbol was not enabled due to missing dependencies. You can also check the generated .config (build/mcuboot/zephyr/.config file to confirm that the CONFIG_MCUBOOT_HARDWARE_DOWNGRADE_PREVENTION symbol was not selected.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>