Method for authorizing the use of a motor vehicle, in particular a two-wheeled or four-wheeled motor vehicle, which has at least a first and a second antenna, wherein the first antenna and the second antenna are spatially remote from one another, by way of a portable identification transmitter that has an identification transmitter antenna, having the following steps: - the first vehicle antenna emits a first signal that is received by the identification transmitter antenna, - the identification transmitter establishes at least one of the spatial components of the first electromagnetic field of the received first signal, preferably using an angle-resolving magnetic field sensor, - the second vehicle antenna emits a second signal that is received by the identification transmitter antenna, - the identification transmitter establishes at least one of the spatial components of the second electromagnetic field of the received second signal, in particular using the angle-resolving magnetic field sensor, - the identification transmitter transmits the established at least one spatial component of the first electromagnetic field of the received first signal and the established at least one spatial component of the second electromagnetic field of the received second signal or first corresponding data to the vehicle, and - a first computer, in particular a computer in the vehicle, establishes the angle at least between the established spatial component of the first electromagnetic field of the received first signal and the established spatial component of the second electromagnetic field of the received second signal, characterized in that, - in a further step, the first vehicle antenna emits, instead of the first signal, the second signal or a signal similar to the second signal and the second vehicle antenna emits, instead of the second signal, the first signal or a signal similar to the first signal, and the motor vehicle provides a first authorization signal for authorizing the use of the motor vehicle only when the established first angle exceeds a predetermined first threshold value. - the first vehicle antenna emits a first signal that is received by the identification transmitter antenna, - the identification transmitter establishes at least one of the spatial components of the first electromagnetic field of the received first signal, preferably using an angle-resolving magnetic field sensor, - the second vehicle antenna emits a second signal that is received by the identification transmitter antenna, - the identification transmitter establishes at least one of the spatial components of the second electromagnetic field of the received second signal, in particular using the angle-resolving magnetic field sensor, - the identification transmitter transmits the established at least one spatial component of the first electromagnetic field of the received first signal and the established at least one spatial component of the second electromagnetic field of the received second signal or first corresponding data to the vehicle, and - a first computer, in particular a computer in the vehicle, establishes the angle at least between the established spatial component of the first electromagnetic field of the received first signal and the established spatial component of the second electromagnetic field of the received second signal, characterized in that, - in a further step, the first vehicle antenna emits, instead of the first signal, the second signal or a signal similar to the second signal and the second vehicle antenna emits, instead of the second signal, the first signal or a signal similar to the first signal, and the motor vehicle provides a first authorization signal for authorizing the use of the motor vehicle only when the established first angle exceeds a predetermined first threshold value.