Abstract: The invention provides a method for testing a hazard detector that includes transmitting a test mode switching signal from a test device to the hazard detector, setting the hazard detector to a test mode, transmitting a first test mode confirmation signal from the hazard detector to a central monitoring unit, transmitting a second test mode confirmation signal from the hazard detector to the test device, processing a hazard condition detected by the hazard detector as a test event, transmitting a test result signal from the hazard detector to the central monitoring unit, the hazard detector outputting a test completion signal, and setting the hazard detector to a detection mode. The invention further provides a hazard monitoring system, a hazard detector, and a test device.

Abstract: The invention provides a method for testing a hazard detector that includes transmitting a test mode switching signal from a test device to the hazard detector, setting the hazard detector to a test mode, transmitting a first test mode confirmation signal from the hazard detector to a central monitoring unit, transmitting a second test mode confirmation signal from the hazard detector to the test device, processing a hazard condition detected by the hazard detector as a test event, transmitting a test result signal from the hazard detector to the central monitoring unit, the hazard detector outputting a test completion signal, and setting the hazard detector to a detection mode. The invention further provides a hazard monitoring system, a hazard detector, and a test device.

Abstract: A method for integrating network subscribers into a time-synchronized ad-hoc network forms individual clusters in each case of regionally adjacent network subscribers and implements a time synchronization of the network subscribers within each cluster. Following this, a network subscriber at the periphery of each cluster is selected in order to identify at least one network subscriber to be integrated into the respective cluster. Finally, the subscribers of the respective cluster are time-synchronized with every identified network subscriber.

Abstract: A communications device according to the present disclosure for communicating within a communications network contains an encryption device and an initialization-vector generator. The encryption device encrypts outgoing messages at least partially by means of a code and an initialization vector, which is generated by the initialization-vector generator. In this context, the initialization vector is generated at least partially on the basis of network information of the communications network.

Abstract: An authentication-encryption unit provides at least one encryption element, where each encryption element encrypts a plain-data block and accordingly generates a cipher-data block. A common checksum is calculated over each cipher-data block. It is possible to select via a selection unit in each encryption element which data bits in each cipher-data block are to be used to calculate the common checksum.

Abstract: A method for integrating network subscribers into a time-synchronized ad-hoc network forms individual clusters in each case of regionally adjacent network subscribers and implements a time synchronization of the network subscribers within each cluster. Following this, a network subscriber at the periphery of each cluster is selected in order to identify at least one network subscriber to be integrated into the respective cluster. Finally, the subscribers of the respective cluster are time-synchronized with every identified network subscriber.

Abstract: A communications device according to the present disclosure for communicating within a communications network contains an encryption device and an initialisation-vector generator. The encryption device encrypts outgoing messages at least partially by means of a code and an initialisation vector, which is generated by the initialisation-vector generator. In this context, the initialisation vector is generated at least partially on the basis of network information of the communications network.

Abstract: An authentication-encryption unit provides at least one encryption element, where each encryption element encrypts a plain-data block and accordingly generates a cipher-data block. A common checksum is calculated over each cipher-data block. It is possible to select via a selection unit in each encryption element which data bits in each cipher-data block are to be used to calculate the common checksum.