You know about malware, ransomware, spyware. But there's an increasing concern about stalkerware, a creepy breed of apps that allow someone else to digitally monitor you. What is stalkerware all about and how can you recognize it? Who plants it and why, and who are its victims? Joining the show are Eva Galperin, director of cyber security at the Electronic Frontier Foundation who also helped found the Coalition Against Stalkerware, and Anthony Melgarejo, threat researcher at F-Secure.