sorry if these have already been discussed, I only found one RSA key topic with the search button.
I dont know if the psp emulator floating around actually works, but if it does... whenever a game is loaded onto it, couldn't one theoretically be able to dump some raw kernel stuff and find a key?
If only there was a way to use a debugger and have a game run so you could see exactly what is going on inside the psp OS...
I'm sure there is a way to trick the psp into thinking your a legitimate game/umd, maybe when a game is released from sony that works off your memory stick, we could dump some raw stuff off of that file.
Another idea involves the EBOOT file that is released from sony, the firmware updates. There is obviously a signature in those files that is allowing them to be executed, one just needs to find that signature... once again requiring a working psp emulator..
--Just a few ideas