We are all vulnerable to digital surveillance, as there’s little protection to prevent our phones from getting hacked. Mercenary spyware products like Pegasus are powerful and sophisticated, marketed to government clients around the world. Cybersecurity expert Ron Deibert tells IDEAS, "the latest versions can be implanted on anyone's device anywhere in the world and as we speak, there is literally no defence against it.” Deibert is the founder of the Citizen Lab at the University of Toronto, a group of tech-savvy researchers who dig into the internet, looking for the bad actors in the marketplace for high-tech surveillance and disinformation. In his new book, Chasing Shadows, he shares notorious cases he and his colleagues have worked on and reveals the dark underworld of digital espionage and subversion.