the security peripheral includes a generation module, a verification module, a generation allow list, a transceiver, and a processor coupled to a memory;

the memory is operational to store a plurality of verification keys and a plurality of generation keys;

the plurality of generation keys includes a dedicated key used by the host to request generation of a first message authentication code;

the security peripheral is operational to determine if the host is permitted to transmit a first message in response to a transmit request and a first key serial number;

the first key serial number identifies the dedicated key of the plurality of generation keys;

the generation module is operational to generate the first message authentication code based on (i) the dedicated key and (ii) a policy in the generation allow list, and not generate the first message authentication code if a message identifier of the host is not in the generation allow list;

the transceiver is operational to transmit to a particular receiver the first message authentication code and the first key serial number in the first message;

the transceiver is further operational to receive from a distinct host a second message that includes a second message authentication code and a second key serial number;

the security peripheral is further operational to determine if the host is permitted to accept the second message;

the second key serial number identifies a second particular one of the plurality of verification keys; and

the verification module is operational to verify that the second message is acceptable based on the second message authentication code and the second particular verification key; and

each receiver is operational to receive a plurality of messages from the host;

the particular receiver of the plurality of receivers is operational to receive the first message from the host;

the particular receiver is further operational to obtain knowledge regarding a relative trustworthiness of the host based at least in part on a type of service to be sent for authentication; and

relocation or movement of one or more among the host and the plurality of receivers to a geographically different location relies on a relative trustworthiness of the host without making substantive changes to the plurality of receivers.