Defending against cyberattacks by giving attackers 'false hope'

"We are interested in the targeted attacks where the attacker is trying to exploit data or critical infrastructure resources, such as blocking data access, tampering facts or stealing data," said Prasad Calyam, associate professor of electrical engineering and computer science and the director of Cyber Education and Research Initiative in the MU College of Engineering. "Attackers are trying to use peoples' compromised resources to infiltrate their data without their knowledge, and these attacks are becoming increasingly significant because attackers are realizing they can make money in a big way like never before."

In this study, the researchers focused on two types of cyberattacks -- those seeking customer data and those stealing resources such as bitcoins, a type of digital currency. Their strategy uses artificial intelligence techniques and psychology principles -- giving the cyberattacker false hope that the attack is working.

"Our 'defense by pretense' system quarantines the attacker and allows the cloud operators to buy time and build a stronger defense for their systems," Calyam said. "The quarantine is a decoy that behaves very similar to the real compromised target to keep the attacker assuming that the attack is still succeeding. In a typical cyberattack the more deeply attackers go in the system, the more they have the ability to go many directions. It becomes like a Whack-A-Mole game for those defending the system. Our strategy simply changes the game, but makes the attackers think they are being successful."

Researchers say buying time is important because it allows those directing the cyber resources to devise a more sophisticated defensive strategy to use at a later time when the cyber-attacker returns to make a more vigorous attack knowing that valuable assets are being defended.