Pwndfu Tool Verified Here

Modifying the storage partitions to allow a single device to boot two different iOS versions.

Because the exploit cannot modify the physical read-only bootrom chips, If a device jailbroken via pwndfu turns off, it will refuse to boot normally or will boot back into a stock, unexploited state. To reactivate the modifications, the device must be plugged back into a computer running the pwndfu tool. Security Implications pwndfu tool