| 摘要 |
A method and apparatus for preventing unauthorized use and therefore enhanced security in electronic devices. Upon power down, conventional modes of power up are disabled. A lockout circuit disables "wake up" events which would otherwise restart the device. A power supply is responsive to power on signals generated by a power controller. The lockout circuit generates an interfering signal that obscures power on signals generated by the power controller. The lockout circuit generates the signal when triggered by a triggering device, which may be a switch or an Ethernet chip. The lockout circuit ceases to generate the interrupt signal when released by a releasing device, which may be a switch, an Ethernet chip or a modem.
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