Proton Mail launches Dark Web Monitoring to alert users to leaks

One of the most common forms of cyberattack is credential stuffing, using exposed details on different sites to exploit the fact that people frequently reuse passwords. Proton Mail is introducing a new Dark Web Monitoring feature that will alert customers if their credentials are exposed on the dark web, where stolen emails and credentials get bought and sold. The feature, built into Proton Mail for paying users, complements Proton Mail's battle tested encryption by warning users if there has been a breach of a third-party service where they might have used their Proton Mail email address to register. Whenever Proton detects the user's email is involved in a leak, it will trigger alerts in the Proton Mail Security Center on web and desktop. More notification mechanisms (email and in-app) will be added soon. The alerts will also let people know the source of the leak, for example which online service they used was hacked.