Can very much recommend this talk. Spoiler: you can differentiate an operating system booting from e.g. a forensic device doing a backup, by looking at the acce

Can very much recommend this talk. Spoiler: you can differentiate an operating system booting from e.g. a forensic device doing a backup, by looking at the access patterns. Also note that the USB spec is rather complex, and some parts of it will be invariably implemented in software. Often in very high-privileged C code. As such, it is likely to contain critical errors. Heres one for the PlayStation 3 that emulates some garbage on a USB port to get fully privileged code execution: https://github.com/psgroove/psgroove/blob/master/psgroove.c https://github.com/psgroove/psgroove/blob/master/psgroove.c