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The individual vulnerabilities of hosts on a network can be combined by an attacker to gain access that would not be possible if the hosts were not interconnected. Currently available tools report vulnerabilities in isolation and in the context of individual hosts in a network. Topological vulnerability analysis (TVA) extends this by searching for sequences(More)
The typical means by which an attacker breaks into a network is through a chain of exploits, where each exploit in the chain lays the groundwork for subsequent exploits. Such a chain is called an attack path, and the set of all possible attack paths form an attack graph. Researchers have proposed a variety of methods to generate attack graphs. In this(More)
The primary original design goal for email was to provide best-effort message delivery. Unfortunately, as the ever increasing uproar over SPAM demonstrates, the existing email infrastructure is no longer well suited to the worldwide set of email users-particularly email receivers. Rather than propose yet another band-aid solution to SPAM, this paper(More)
In this paper, we present an efficient, novel framework for establishing, assessing, and managing trust in inter-organizational relationships, in terms of allowable network sharing, that is based on analyzing an invariance property of a computer network environment. Our goal is to answer the following two questions: (1) From any given host in one network,(More)
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