Figuring out who's behind a cyberattack is hard — something that cybersecurity experts will tell you time and time again. — Mark Nunnikhoven, Trend MicroSo far, neither Metrolinx nor the Ontario government have offered any evidence to back up that claim. The lack of information has made it difficult to understand the severity of the attack, let alone know how Metrolinx concluded North Korea was to blame. Often, cybersecurity researchers who study such attacks will release detailed reports outlining their findings, in part to back up their claims. Cybersecurity researchers who study attacks against companies or dissidents will often release detailed public reports outlining their findings, in part to back up their claims.

Source: CBC News January 24, 2018 21:56 UTC