| 摘要 |
<p>A device such as a network appliance compares reference device attributes of the device obtained during manufacture to attributes of the device sampled at start-up to determine whether the device has been tampered with since manufacture. At manufacture, attributes of components of the device are measured, including attributes not normally measurable after manufacture. Upon initial power up in the field, the device measures the same attributes and compares the resulting measurements to the corresponding attribute values measured at manufacture. If any attribute has changed, the device determines that it may have been modified or tampered with and so indicates.</p> |
