| 摘要 |
<p>A tamper-resistant packaging approach protects non-volatile memory ( 108 ). According to an example embodiment of the present invention, a package ( 106 ) having a plurality of magnetic particles ( 120 - 125 ) therein is arranged with an integrated circuit device ( 100 ) to cause a plurality of magnetically-responsive circuit nodes ( 130 - 134 ) to take on magnetic states. Each magnetic state is detected as a logic state, and then compared with a real-time logic state of the magnetically-responsive circuit nodes and, in response to a stored logic state being different from a real-time logic state, package tampering is detected. In one instance, tampering is detected when the magnetic state of one of the magnetically-responsive circuit nodes is altered as a portion of the package is removed. The detected tampering may alter a characteristic of the integrated circuit, such as by altering stored data or setting a tamper flag that indicates the package has been tampered with.</p> |
