Security wrap with tearable substrate

摘要

An electronic device 10 (figure 1) is protected from unauthorized access by use of a security wrap 20 having a security screen 26 which may be connected to an alarm circuit of the electronic device. The security screen has a pair of screen terminals 48 interconnected by a conductor 46. The conductor 46 is formed on a tearable substrate 22 such as paper. The electronic device may be a chip mounted on a point of sale device such as a credit card reader so that data held on the chip is protected. The substrate is arranged such that attempts to remove the security wrap will result in the substrate being torn and the conductor being damaged or broken whereby the resistance of the conductive path formed by the conductor changes to indicate an alarm condition. The substrate and conductor are adhered to electronic device to be protected. The substrate may have weakened areas to promote tearing of the substrate. A further security screen may be formed at least partially overlapping the first security screen and is electrically insulated from the first screen.