People talked a lot about the firmware patch released by Sony for the PSP users.This patch was primarily released for fixing some security issues. You can watch the demo here.
Demo shows HEN environment on a PSP 2003 (3000 Support also) on 5.03 Official Firmware,and it was booting from tiff exploit.Now what does that mean? One thing that can be suggested from the video that in this exploit MAC address and system software can be changed and the code may survive the reboot.
Not much details are known yet and there are several questions that can only be answered on its release.