Here are 10 cloak-and-dagger ways, legal and illegal, to secretly tap into networks and computers to capture data and conversations.

1. Wireless keyboard eavesdropping: Remote-exploit.org has released an and accompanying software for a device that captures then decrypts signals from wireless keyboards. The device uses a wireless receiver that can be concealed in clothing or disguised as a common object that could be left on a desk near a PC to pick up signals.

Called Keykeriki, the technology targets 27MHz wireless keyboards to exploit insecurities that remote-expoit.org discovered earlier. The company plans to build and sell the hardware.

2. Wired keyboard eavesdropping: Electromagnetic pulses that keyboards make to what key is being hit travel through the grounding system of the keyboard and the computer itself as well as the ground for the electrical wiring in the building where the computer is plugged in.