A device, such as a component or a peripheral, and corresponding computer are adapted to be bound such that the device will only operate with that computer after the binding process. Cryptographic messages are sent between the device and computer to confirm the relationship. When the device cannot confirm it is operating with the previously bound computer, the device reduces its own operating capability to render itself substantially useless until either unbound from that computer or a successful confirmation takes place. Methods for operation, binding and unbinding are also disclosed.