URL scanning services are now a common component of modern security workflows. They help detect phishing websites or malware early and warn users before they visit a URL. However, the practice of some of these services—publishing scanned URLs—can inadvertently expose sensitive user data. CISPA researcher Ali Mustafa, together with colleagues from the Max Planck Institute for Security and Privacy and Ca’ Foscari University of Venice, conducted the first systematic investigation of the risks arising from this practice.
When security becomes a risk factor—privacy risks of public URL-scanning services
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