https://bearboss.blog/2009/07/16/%e6%96%b0%e9%ae%ae-%e9%9b%bb%e8%85%a6%e8%b3%87%e8%a8%8a%e9%98%b2%e8%ad%b7%e5%8f%88%e4%b8%80%e7%ab%a0-usb-port-lock-with-blockers/