Hi, @costaud Even the flash encryption key is read/write protected, but if the FLASH_CRYPT_CNT is not write protected and secure boot is not enabled, flash encryption will be ineffective. The best way to figure out the eFuse setting result is run espefuse.py summary after using the FlashDownloadTool...

Hi, @ESP_Angus I built the bootloader.bin with One-time Flash option which is suggested in the Secure Boot guide. My dev boards didn't enable Secure Boot before that, I checked them with espefuse.py ** summary before testing secure boot, cause I test flash encryption before this test. The ABS_DONE_0...

Thanks a lot

Today, I tested the secure boot with flash encryption of ESP-IDF, I use a simple example and follow the instructions step by step. Before that I tested the flash encryption only, I succeeded. But enabled both, I got: secure boot check fail I bricked 2 Dev boards with the same monitor logging results...

Hi, @Mr_red I checked the bootloader's size before flash it, cause the instruction mentioned about that. It's smaller than that (<16k), cause I changed the settings for bootloader logging. And I just tested the Verify function of espsecure.py which is in the bundle of esptool. I've found that espsec...

Hi, I did some tests about secure boot and flash encryption. The result is not 100% perfect, but I actually bricked 2 dev boards. I'm wondering if there is a way to reset the eFuse to factory setting? which I think may not harm the data in flash, cause the secure boot and flash encryption will not p...

Hi, @costaud, thanks. I read these instructions: https://docs.espressif.com/projects/esp-idf/en/latest/security/flash-encryption.html https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html and this (the diagrams are welcomed): https://blog.csdn.net/espressif/article/details/...

Hi, I got a DOIT ESP32 board, I press and hold Boot key when downloading the flash when flashing start I let it go. But the DOIT ESP32 didn't get a Reset button. I tried to press EN or BOOT, or together, but the board didn't reset. But the board does reset when clicking the Reset button of Arduino I...

Hi, I'm using ESPFlashDownloadTool_v3.6.4 My OS is win10x64 My device is MH-ET ESP32MiniKit which uses an ESP-WROOM-32 module. I tested download bins files with default security.conf, it worked. But I tried to download with Flash Encryption enabled, it failed. :( Here is my security.conf [DEBUG MODE...

I'm using ESP32 Arduino with Arduino IDE, and I read the ESP-IDF Programming Guide to learn the Flash Encryption and Secure Boot. My target is to protect my firmware codes from copier and cracker. I think Flash Encryption is what I need. I guess the simplest way of doing that is by Reflashing via Pr...