You're right, it's obvious.
However, as I said, it wouldn't hurt if someone who had the backuptool tried to:
1: Create a new save/game/file, and call yourself something you'd recognize (onetwoshoe)
2: Back it up, decrypt.
3: Use a hex editor to find your name, and make it much longer. make it (onetwoshoefollowyoutothefarm)
4: Encrypt, put it back.
5: If the game crashes, we're at least one step closer. If the save file is recognized as invalid, no go.
This is just hypothetically, I'm no hacker and read how to do this on a guide to finding exploits on psp saves.
However, as I said, it wouldn't hurt if someone who had the backuptool tried to:
1: Create a new save/game/file, and call yourself something you'd recognize (onetwoshoe)
2: Back it up, decrypt.
3: Use a hex editor to find your name, and make it much longer. make it (onetwoshoefollowyoutothefarm)
4: Encrypt, put it back.
5: If the game crashes, we're at least one step closer. If the save file is recognized as invalid, no go.
This is just hypothetically, I'm no hacker and read how to do this on a guide to finding exploits on psp saves.