An appliance includes a processor, a medium, a registration application, and a monitoring application. The registration application includes instructions in the medium that, when read and executed by the processor, configure the registration application to write a transaction identifier to a start message, the transaction identifier identifying the appliance, write a dataset of interest identifier to the start message, and send the start message to a database. The dataset of interest identifies a group of appliances including the appliance. The monitoring application includes instructions in the medium that, when read and executed by the processor, configure the monitoring application to monitor operations executed on the appliance, write data resulting from the operations to a data message, and send the data message anonymously to the database. The data message is signed with a member key associated with the group of appliances.