Lurkers sharing an unsecured Wi-Fi network with you could see when you’re swiping right or left on Tinder and when you start a chat with someone, according to security research published Tuesday. “It’s very simple to execute because the problem is, Tinder actually neglected to encrypt some of the data,” Amit Ashbel, director of product marketing with the security firm Checkmarx, which led the study, told BuzzFeed News. “You just have to listen to the network and you’ll have the images available to you.”