LLB

This is the Low Level Bootloader. It runs several setup routines and on firmware versions 2.0 and higher it checks the signature of iBoot before jumping to it.

Those same setup routines are present in iBEC and iBSS, which is why they can be launched directly from DFU Mode.

Patched LLB

Restoring or Flashing a Patched LLB with Pwnage, Pwnage 2.0 or 24kpwn can lead to those changes:

• ECID checks on boot-up are cancelled
• A restored firmware is no longer integrity-checked
• RSA Signature Hash blobs (SHSH blobs) are ignored
• Jailbreak is always untethered for a pwn-able device
• Custom bootlogos and recovery logos can be applied