After, thinking a little bit, I suppose that locksmith tool (i have it here) with easily disarm the 6 digits alarm, that I can actually encrypted if not using an usb port, I definitely do not want. So, let's, again, keep it simple! the alarm I'm using its a very common sms alert, however its a PIR sensor, infra red. This means if they want to jam, the circuit, the infra red is pyrotechnics (materials like Gallium Nitride), and so, the jam radiation will provoke a short circuit, arming the bomb.