Abstract: The invention provides a method, in a processor, for executing a cryptographic computation. Upon the execution of the computation there is applied a base masking through which intermediate values are incorporated into the computation as masked intermediate values. Upon the execution of the computation a secondary masking is additionally applied, wherein for each intermediate value masked by means of the base masking the one's complement of the masked intermediate value is formed, the masked intermediate value and the one's complement of the masked intermediate value are made available, and randomly the computation is executed either with the masked intermediate value or with the one's complement of the masked intermediate value.

Abstract: A method for checking a circuit devised for contactless data communication, which comprises an antenna and an electronic component coupled with the antenna, comprises the following steps: generating an alternating magnetic field of a field strength, and arranging the circuit in the alternating field region. Then the electronic circuit is excited by means of an energy pulse. In a further step, an oscillation of the circuit in response to the excitation of the circuit by the energy pulse is captured. The captured oscillation of the circuit is finally evaluated, in particular with regard to a self-resonant frequency of the circuit.

Abstract: A multilayer card-shaped data carrier has a core layer based on paper, with an individualization formed in the layer. At least a part of the area of the data carrier is deformed into a relief which has a viewing angle-dependent optical effect and which extends into the core layer through the cover layer.

Abstract: A method comprises the following steps: supplying the subscription on the security element of the user's mobile end device, with the subscription being held available on a background system by a service or product provider as one subscription of a plurality of subscriptions and enabling communication over a mobile radio network; and accessing the mobile radio network by the security element by means of the subscription supplied on the security element. While the security element accessing the mobile radio network the position of the mobile end device is determined at time intervals in order to check whether the position of the mobile end device falls within a predefined range of allowed positions and, if the established position of the mobile end device does not fall within the predefined range of allowed positions, the access of the security element to the mobile radio network is interrupted.

Abstract: A composite film material usable in a data carrier card body includes a first outer plastic layer, an inner plastic layer and a second outer plastic layer, all the layers together forming a co-extruded composite. The plastic material of the first outer layer is a polyethylene terephthalate glycol copolymer (PETG) or contains a PETG, the plastic material of the inner layer is a thermoplastic elastomer (TPC) or containes a TPC, and the plastic material of the second outer layer is a PETG or contains a PETG.

Abstract: The invention provides a method for securely inputting an access code to an input interface of a mobile end device. During an input time period covering the process of inputting the access code, at least one or some sensors of the end device that are uninvolved in the input of the access code, said sensors being respectively arranged for capturing sensor variables by sensor, are hindered from capturing and/or passing on the respective sensor variable. Possible sensors are acceleration sensors or a digital camera. The method prevents the access code from being spied out by means of the deactivated sensors.