If the first 1 MB shows high entropy (>0.98) with no known signatures, suspect encryption.
onto HiLink-based hardware. Standard U-Boot will often reject images that do not have this specific encrypted header format if the bootloader is locked. Post Tenebras Lab a specific HiLink bin file? encrypted hilink uimage firmware header
Example decrypted header (hexdump):
A standard uImage consists of a followed by the actual compressed kernel (zImage) or root filesystem. This header, defined in include/image.h of U-Boot, contains: If the first 1 MB shows high entropy (>0
Once decrypted, the header reverts to a standard UImage header with one twist: the ih_name field often contains a secondary signature or a plaintext marker like "SECURE_HILINK_V1" . 0.98) with no known signatures