Email-based online phishing is a critical security threat on the Internet. Although phishers have great flexibility in manipulating both the content and structure of phishing emails, phishers have much less flexibility in completely concealing the ...
Spear phishing has been a persistent threat to users and organizations, and yet email providers still face key challenges to authenticate incoming emails. As a result, attackers can apply spoofing techniques to impersonate a trusted entity to conduct ...
OpenPGP and S/MIME are two major standards for securing email communication introduced in the early 1990s. Three recent classes of attacks exploit weak cipher modes (EFAIL Malleability Gadgets, or EFAIL-MG), the flexibility of the MIME email structure (...
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