1. What would be the point of having a non 4 digit power-on passcode? 2. Is it used to protect system keys for hardware encryption? 3. Does it serve anything else, other than to protect access to the device? 4. Do the workarounds to access iphones that are password protected, just crack the simple 4-digit passcode, or use a operating system flaw? I read an article that some guy said he cracked the 256 encryption on the iphone. Then another source said he only found a way to access the keys to the encryption system, by cracking the 4-digit passcode.