Abstract: The invention relates to a method (100) for activating at least one security function of a security system (200) of a vehicle (1). According to the invention, provision is made for the detection of at least one distance information about a distance (A) of a mobile identification transmitter (300) to the vehicle (1) by means of a detection device (10) of the vehicle (1) and a transmission of the distance information by a data transmission from the detection device (10) via a transmission system (50) of the vehicle (1) to a processing device (60) of the vehicle (1), wherein the data transmission of the distance information is performed in a forgery-proof manner.

Abstract: The invention relates to a method (100) for a security system (200) of a vehicle (1), in particular for a keyless activation of at least one security function of the vehicle (1).

Abstract: The invention relates to a module unit (10) for adapting a mobile portable communication device (20) to a security system (1) of a vehicle (2), in particular for the keyless activation of an access system of the vehicle (2), with an interface (10.1) for the data exchange (30) with the communication device (20), and at least one communication unit (10.2) for the communication with the security system (1), wherein the module unit (10) is configured in such a way that the communication can be performed by a wideband communication method.

Abstract: The invention relates to a method (100) for an activation of at least one security function of a security system (200) of a vehicle (1), wherein an authentication at the security system (200) of the vehicle (1) is effected by means of a mobile identification transmitter (300).