Patent ID: 8850559

Claim:
A security method of a portable device, the security method comprising: an application program of the portable device receiving a command of an owner when the portable device is powered on; the application program notifying a basic input/output system to set a protection variable in a read-only memory, and notifying the owner to set a password in a setup menu of the basic input/output system after the application program receives the command of the owner; a keyboard controller turning off the portable device to enable the protection variable after the basic input/output system sets the protection variable in the read-only memory and the setup menu of the basic input/output system stores the password; and the basic input/output system checking a password inputted to the portable device at least once according to the password and the protection variable and the basic input/output system executing a corresponding operation according to a check result whenever the portable device is powered on after the protection variable is enabled, wherein the protection variable does not check the password inputted to the portable device at least once.