Savedata Encryption/Decryption

[Itaru]

I just want to add that I also have the 0 bytes PARAM.SFO problem with the game Persona 3 Portable (ULUS10512). I can load my old saves just fine, but then when I try to save to a different slot, the PARAM.SFO file is empy although all the other files in the folder seem to be created correctly. JPCSP crashes when I try to load the save with the empty PARAM.SFO file.