Tor is free software and an open network that helps you defend against traffic analysis, a form of network surveillance that threatens personal freedom and privacy, confidential business activities and relationships, and state security. https://www.torproject.org/ http://www.darknet.org.uk/popular-posts/
http://www.techlib.com/electronics/induction.html The induction receiver shown below is very sensitive and can serve a variety of
purposes. It is excellent for tracing wiring behind walls, receiving audio from an
induction transmitter, hearing lightning and other electric discharges, and monitoring a
telephone or other device that produces an audio magnetic field ("telephone pickup
coil").