Air gapping is a method for isolating computers with sensitive data from the rest of the network, but researchers in Israel have found a way to defeat it using an unlikely communication conduit: heat. This marks the first time a two-way communication channel has been created between air gapped systems. It uses malware to hook into the computers' thermal sensors. The way it works is fascinating, but it means once again, the security measures we rely on don't protect us quite as completely as we thought.
Read more here: