ic... so esok la kan????

nih untk student yang belajar engineering prog... mcm myx and aku

http://www.dark-alex.org/forum/viewtopic.php?f=44&t=1194

The second 0x10 bytes seem also to be dependent of the decrypted body (maybe dependent of the previous 0x10 bytes too?). In the picture it can be seen that they are different in 4.01 and 4.05, but they can actually be interchanged, you can move those 0x10 bytes from the same block in 4.05 ipl to the 4.01 ipl and it will still boot; however it cannot be randomized.

This protection also destroys any possibility of downgrading below 4.00, as these new cpu's won't be able to boot previous firmwares ipl's.

Summary: basically, all security of newest psp cpu's rely on the secrecy of the calculation of those 0x20 bytes. If pre-ipl were dumped somehow, the security would go down TOTALLY.
so... jgn anggap leh pkai memory stick
kene develope cara lain...