A client data distribution service may receive messages from a client device requesting data sets from the data distribution service. The data sets may include a client certificate used to protect in verified subsequent communications between the client device in the data distribution service as well as provisioning packets used by the client device to enable operation by the user. Specific messages between the client device in the data distribution service include hardware identifiers, initialization keys, last used sequence numbers, and Underwriter product identifiers. Corresponding acknowledgment messages may be used by the data distribution service to remove completed transactions.