haxiang
Well, nowadays is secure era, digital signature with cryptographic algorithm is used for secure boot in most platform, include Android, mainly for the following purpose:
1. Images signature
2. Secure Boot Process
3. Image update/download
Bypass bootloader authorization is not possible due to uncrackable/unhackable cryptographic algorithm which used in this particular digital sign process. If we can hack this kind of secure algorithm, we will not work in UFi Box, high scale technology companies will compete to employ us 😉
rehansk8878 As I mention in above reply, digital sign is implemented in image update/download trough USB protocol, if you can remove the emcp, then you can reprogram, including remove pattern, without bootloader authorization.