A system is provided for tamper identification. At least one fastener is used to seal a compartment or secure a device. The fastener has a tamper identification surface with a unique grain structure that is altered if the fastener is removed or otherwise exposed to sufficient torque. After a period of time such as e.g., shipment and/or storage of the sealed container, a determination of whether tampering has occurred can be undertaken by examining the grain structure to determine if it has changed since the fastener was used to seal the container or secure the device. Tools and other components specifically designed to alter the grain structure of the tamper identification surface may be employed. A variety of fastener types may be used, and the fastener may be configured with one or more materials more susceptible to alteration of the grain structure along the tamper identification surface so as to enhance the ability to determine tampering. Authentication is also provided.
FEDERAL RESEARCH STATEMENT
 This invention was made with Government support under Contract No. DE-AC09-08SR22470, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.