By Joseph Menn LAS VEGAS (Reuters) – A team of security researchers has demonstrated the ability to hijack standard equipment inside computers, printers and millions of other devices in order to send information out of an office through sound waves. The new makeshift transmitting antenna, dubbed “Funtenna” by lead researcher Ang Cui of Red Balloon Security, adds another potential channel that likewise be would be hard to detect because no traffic logs would catch data leaving the premises. Hackers would need an antenna close to the targeted building to pick up the sound waves, Cui said, and they would need to find some way to get inside a targeted machine and convert the desired data to the format for transmission.
Source: U.S. researchers show computers can be hijacked to send data as sound waves – Yahoo News Canada