Why, and for whom ?

Use cases

Vendor want to restrict access from the user:

• Console vendor wanting to avoid access to their game.
• Vaccuum vendor want to force cloud usage for their product
• Phone vendor want to control which software you are running (android/iphone)
• DRM
  • DVD zoning to control market
  • hdmi / video - to control copy
  • Sony BMG copy protection rootkit scandal

Not necessary for security alone, because once customer is unable to control what is runned,

• he cannot patch himself security issue
• he still subject to security attack (if vendor breached).

Bypass

AllWinner SOC

FEL is a low-level subroutine contained in the BootROM on Allwinner devices. It is used for initial programming and recovery of devices using USB.

FEL

• FEL/USBBoot
• Allwinner Boot / FEL / FES / NAND Dump
• FEL Mode Drivers - Exdroid Tablet

Device concerned

• Roborok vaccuum