Abstract: A method and system for securely pairing wireless devices, includes deploying a master device in a network environment, and a new device to be securely integrated into the network environment executes an unauthenticated key exchange with the master device. The master device has a security association with a camera system that monitors an operational area where the new device is placed, based on the exchanged key, the master device and the new device each compute a key confirmation code. The camera system learns the key confirmation code from the master device. The camera system watches for devices transmitting the key confirmation code and provides images of such identified devices to the master device, based on an analysis of an image of a device identified by the camera system, an authorization decision is made with respect to accepting the identified device as new device of the network environment.

Abstract: Method for operating a smart grid including a plurality of smart meters configured to monitor at least one physical measured quantity and to provide measurement results of the at least one physical measured quantity to a central entity, includes the following steps: partitioning the smart grid into groups of smart meters, such that each of the smart meters belongs to exactly one group, all smart meters of one of the groups encrypt their measured value by applying a bihomomorphic encryption scheme and send it to the central entity, one smart meter per group is designated as key aggregator to which all smart meters of that group send their key employed for the encryption, the key aggregator computes the aggregation of all received keys and sends the aggregated key to the central entity, the central entity aggregates all received encrypted measured values and decrypts the aggregation by employing the aggregated key.

Abstract: A method and system for securely pairing wireless devices, includes deploying a master device in a network environment, and a new device to be securely integrated into the network environment executes an unauthenticated key exchange with the master device. The master device has a security association with a camera system that monitors an operational area where the new device is placed, based on the exchanged key, the master device and the new device each compute a key confirmation code. The camera system learns the key confirmation code from the master device. The camera system watches for devices transmitting the key confirmation code and provides images of such identified devices to the master device, based on an analysis of an image of a device identified by the camera system, an authorization decision is made with respect to accepting the identified device as new device of the network environment.

Abstract: Method for operating a smart grid including a plurality of smart meters configured to monitor at least one physical measured quantity and to provide measurement results of the at least one physical measured quantity to a central entity, includes the following steps: partitioning the smart grid into groups of smart meters, such that each of the smart meters belongs to exactly one group, all smart meters of one of the groups encrypt their measured value by applying a bihomomorphic encryption scheme and send it to the central entity, one smart meter per group is designated as key aggregator to which all smart meters of that group send their key employed for the encryption, the key aggregator computes the aggregation of all received keys and sends the aggregated key to the central entity, the central entity aggregates all received encrypted measured values and decrypts the aggregation by employing the aggregated key.