A vehicle security system for preventing misuse of sensitive information entered by an authorized person to access a vehicle, wherein the vehicle security system comprises: • an input interface configured to receive input of information by a person; • a camera mounted on or in a vehicle configured to perform face detection of a person; • a memory configured to store information; • a processing circuitry connected to the input interface, the camera and the memory configured to cause the vehicle security system to: - activate a first input session wherein the input interface is adapted to receive input of sensitive information by a first person in an operational vicinity of the input interface; - detect, by the camera unit, a second face of a second person at a second distance from the input interface; and - store a first security association data comprising information regarding the first input session and information about the second person in the memory; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person; and • send information about what possible sensitive information that could have been observed by the second person to an authorized person or authorized entity; and/or • discard any further attempt to input the same sensitive information via the input interface again. • an input interface configured to receive input of information by a person; • a camera mounted on or in a vehicle configured to perform face detection of a person; • a memory configured to store information; • a processing circuitry connected to the input interface, the camera and the memory configured to cause the vehicle security system to: - activate a first input session wherein the input interface is adapted to receive input of sensitive information by a first person in an operational vicinity of the input interface; - detect, by the camera unit, a second face of a second person at a second distance from the input interface; and - store a first security association data comprising information regarding the first input session and information about the second person in the memory; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person; and • send information about what possible sensitive information that could have been observed by the second person to an authorized person or authorized entity; and/or • discard any further attempt to input the same sensitive information via the input interface again. - activate a first input session wherein the input interface is adapted to receive input of sensitive information by a first person in an operational vicinity of the input interface; - detect, by the camera unit, a second face of a second person at a second distance from the input interface; and - store a first security association data comprising information regarding the first input session and information about the second person in the memory; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person; and • send information about what possible sensitive information that could have been observed by the second person to an authorized person or authorized entity; and/or • discard any further attempt to input the same sensitive information via the input interface again. • send information about what possible sensitive information that could have been observed by the second person to an authorized person or authorized entity; and/or • discard any further attempt to input the same sensitive information via the input interface again.