| 摘要 |
A secure device ( 1 ) has a circuit board ( 2 ) with various exposed components such as an LCD ( 4 ) and keys ( 40 ). A secure circuit ( 10 ) is housed within an enclosure formed between the board ( 2 ) and a cover ( 11 ). The cover ( 11 ) has, on its inside surface, a security track ( 23 ) in a dense serpentine pattern. The board ( 2 ) has a security track ( 52 ), also in a dense serpentine pattern, is an inner layer. The track ( 52 ) is linked to covered surface-level tracks ( 27 ) by vias ( 64 ). The cover's security track ( 23 ) is connected to the board's security tracks ( 52, 27 ) via a deformable pad ( 25 ) whose conductivity increases with applied compression. |
