A driving device for an electric bicycle, comprising - a bottom bracket shaft, - an output shaft for driving a wheel of the electric bicycle, and - a superposition transmission whose gear ratio is steplessly adjustable by means of two electric motors (E1, E2) and via which the bottom bracket shaft and the output shaft are coupled with each other, wherein a torque generated by a first electric motor of the two electric motors (E1, E2) can at least partly be transmitted to the output shaft, characterized in that the driving device comprises an electronic anti-theft device via which at least one of the electric motors (E1, E2) is operable in an operating condition in which an electromotively generated torque counteracts a rotation of the bottom bracket shaft in a forward direction of rotation, wherein the driving device comprises an electronic control unit which is configured to actuate at least one of the electric motors (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, in response to an electronically detected rotation of the bottom bracket shaft in the forward direction of rotation, wherein - the electronic control unit is configured to actuate the at least one electric motor (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, only after it has been electronically detected that the bottom bracket shaft has been rotated by at least a stored minimum number of revolutions, or a defined monitoring period has elapsed, and/or - the anti-theft device is equipped and configured to electronically authenticate an authorized user and can be deactivated in response to the authentication of an authorized user, wherein the electronic control unit is configured to actuate the at least one electric motor (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, only after an authorized user has not been authenticated within a specified period after the electronic detection of a movement of the electric bicycle, such that first the specified period is awaited to check whether the authentication of the authorized user still is effected, before the at least one electric motor (E1, E2) for generating of the counteracting torque is actuated. - a bottom bracket shaft, - an output shaft for driving a wheel of the electric bicycle, and - a superposition transmission whose gear ratio is steplessly adjustable by means of two electric motors (E1, E2) and via which the bottom bracket shaft and the output shaft are coupled with each other, wherein a torque generated by a first electric motor of the two electric motors (E1, E2) can at least partly be transmitted to the output shaft, characterized in that the driving device comprises an electronic anti-theft device via which at least one of the electric motors (E1, E2) is operable in an operating condition in which an electromotively generated torque counteracts a rotation of the bottom bracket shaft in a forward direction of rotation, wherein the driving device comprises an electronic control unit which is configured to actuate at least one of the electric motors (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, in response to an electronically detected rotation of the bottom bracket shaft in the forward direction of rotation, wherein wherein a torque generated by a first electric motor of the two electric motors (E1, E2) can at least partly be transmitted to the output shaft, characterized in that the driving device comprises an electronic anti-theft device via which at least one of the electric motors (E1, E2) is operable in an operating condition in which an electromotively generated torque counteracts a rotation of the bottom bracket shaft in a forward direction of rotation, wherein the driving device comprises an electronic control unit which is configured to actuate at least one of the electric motors (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, in response to an electronically detected rotation of the bottom bracket shaft in the forward direction of rotation, wherein - the electronic control unit is configured to actuate the at least one electric motor (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, only after it has been electronically detected that the bottom bracket shaft has been rotated by at least a stored minimum number of revolutions, or a defined monitoring period has elapsed, and/or - the anti-theft device is equipped and configured to electronically authenticate an authorized user and can be deactivated in response to the authentication of an authorized user, wherein the electronic control unit is configured to actuate the at least one electric motor (E1, E2) for generating the counteracting torque, when the anti-theft device is activated, only after an authorized user has not been authenticated within a specified period after the electronic detection of a movement of the electric bicycle, such that first the specified period is awaited to check whether the authentication of the authorized user still is effected, before the at least one electric motor (E1, E2) for generating of the counteracting torque is actuated.