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 (P1) in an operational vicinity of the input interface ; - detect, by the camera unit , a second face (F2) of a second person (P2) at a second distance (L2) from the input interface ; and - store a first security association data comprising information regarding the first input session and information about the second person (P2) in the memory ; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person (P2); and • send information about what possible sensitive information that could have been observed by the second person (P2) 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 (P1) in an operational vicinity of the input interface ; - detect, by the camera unit , a second face (F2) of a second person (P2) at a second distance (L2) from the input interface ; and - store a first security association data comprising information regarding the first input session and information about the second person (P2) in the memory ; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person (P2); and • send information about what possible sensitive information that could have been observed by the second person (P2) 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 (P1) in an operational vicinity of the input interface ; - detect, by the camera unit , a second face (F2) of a second person (P2) at a second distance (L2) from the input interface ; and - store a first security association data comprising information regarding the first input session and information about the second person (P2) in the memory ; - analyze the first security association data to determine what possible sensitive information that could have been observed by the second person (P2); and • send information about what possible sensitive information that could have been observed by the second person (P2) 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 (P2) to an authorized person or authorized entity; and/or • discard any further attempt to input the same sensitive information via the input interface again. <EOS>