Abstract: From Dolev-Yao to Strong Adaptive Corruption: Analyzing Security in the Presence of Compromising Adversaries Cas Cremers and David Basin We formalize a hierarchy of adversary models for security protocol analysis, ranging from a Dolev-Yao style adversary to more powerful adversaries who can reveal different parts of principals' states during protocol execution. We define our hierarchy by a modular operational semantics describing adversarial capabilities. We use this to formalize various, practically-relevant notions of key and state compromise. We also use our semantics as a basis to extend an existing symbolic protocol-verification tool with our adversary models. This tool is the first that supports notions such as weak perfect forward secrecy, key compromise impersonation, and adversaries capable of so-called strong corruptions and state-reveal queries. As applications, we use our model hierarchy to relate different adversarial notions, gaining new insights on their relative strengths, and we use our tool find new attacks on protocols.