Techniques for managing security of a data processing system are described herein. According to one embodiment, in response to a request for modifying a security settings of a data processing system, a message is displayed on a display of the data processing system to request a user who operates the data processing system to perform a physical action to prove that the user was physically present to issue the request for modifying the security settings. It is verified whether a user action physically performed by the user conforms to the requested physical action. The security settings of the data processing system is modified, in response to determining that the user action conforms to the requested physical action.