An electronic system includes a host and a client device, wherein the client device can be physically implemented as a single chip-packaged integrated circuit or multi-chip circuit and has logic to use a physical non-reproducible function to generate a security key. The device can include logic located on the client to provide the physical non-replicable function key to the host in a secure manner. The physical non-replicable function may use the entropy obtained by the non-volatile memory unit to generate an initial key. The logic is to disable changes to the physical non-replicable functiondata, and thus the key is frozen after the key is stored in the data set.