Eavesdropping on wireless communications depends on the ability to determine critical information about the basic properties of the communication link, known as channel state information, or CSI. A new study suggests ways to prevent eavesdroppers from obtaining the channel state information, offering a first line of defense for wireless security.

Yingbo Hua describes a scenario involving a wireless network of legitimate users all equipped with full-duplex radio, which can transmit and receive on the same channel. Hua’s proposed fix allows two or more users to transmit a secret to each other without allowing eavesdroppers to discover the secret by preventing them from learning the network’s channel state information. See more details at UCR News.