A data source device (“device”) can generate a plurality of data segments, each of which can include data that is owned by a specific entity. The device can calculate and store a hash for each data segment of the plurality of data segments as part of a message footer of a data message. The device can calculate and store a further hash that includes a combination of the plurality of data segments and the hashes for the plurality of data segments as part of the message footer. The device can encrypt each data segment to create a plurality of encrypted data segments. The device can assemble the data message to include the plurality of encrypted data segments and the message footer. The device can send the data message to a gateway for further processing.