Abstract: A method for verifying an object preferably a document, a (bank) card and/or a product package is provided with an electrically conductive security feature on a device with a capacitive surface sensor. After the object with the security feature is placed on the surface sensor, in particular a dynamic input is performed on the object and the electrically conductive security feature using an input means for generating a characteristic time-dependent signal on the surface sensor. The detected time-dependent signal is subsequently evaluated. Furthermore, an object with a security feature or method for its production, system or kit for carrying out the method and for verifying a document is provided with a conductive electrical security feature on a capacitive surface sensor.

Abstract: The invention relates to a device and a system for generating a periodic signal on a capacitive surface sensor, as well as the use of the device for generating a periodic signal on a capacitive surface sensor. The device is formed by a three-dimensional object, on at least the contact side of which an electrically conductive structure is arranged. The system comprises such a device, as well as a capacitive surface sensor, wherein the device can be used for generating periodic signals on the surface sensor.

Abstract: A method for multi-factor authentication on a device with a capacitive area sensor is provided in which a device with an electrically conductive structure on a non-conductive substrate represents a first authentication factor and information for the execution of an input sequence on the device represents a second authentication factor. Authentication can be performed by means of a comparison with reference data, in accordance with the likelihood with which a signal detected by the area sensor was generated by a combination of the first and second authentication factors. A device, a system and a kit for executing the method for multi-factor authentication on a capacitive area sensor.are provided.

Abstract: A device is provided that includes an electrically conductive structure on a non-conductive substrate for generating a time-dependent signal on a capacitive surface sensor. A method for generating a tamper-proof time-dependent signal on a surface sensor is also provided by means of such a device. A system or kit for carrying out the method and generating a time-dependent, tamper-proof signal on a capacitive surface sensor is also provided.