Reading Efuse Block 1

[dhirajp28]

Hi,
Is it possible to read the value of flash enc key from efuse block using following api:

esp_efuse_read_block(EFUSE_BLK1,enc_key_256,0x0000, 256);

Currently I am getting all values as zero , since read protect is enable. Is there a way to disable it?

Thanks,
Dhiraj

[ESP_Sprite]

No; the entire idea of read protect is that no one can ever read the key again, which makes it pretty much impossible for an attacker to decrypt the firmware externally. Having a way to make the key readable again would defeat that purpose.