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MapReduce is a framework for processing large data sets much used in the context of cloud computing. MapReduce implementations like Hadoop can tolerate crashes and file corruptions, but not arbitrary faults. Unfortunately, there is evidence that arbitrary faults do occur and can affect the correctness of MapReduce job executions. Furthermore, many outages of major cloud offerings have been reported,...
The Border Gateway Protocol (BGP) plays a critical role in the Internet providing connectivity to hosts across the world. Unfortunately, due to its limited security, attackers can hijack traffic by generating invalid routes. Some detection systems for route hijacking have been presented, but they require non-public information, high resources, or can easily be circumvented by attackers. We propose...
In this work we present the Byzantine Fault Tolerant Non-Blocking Weak Atomic Commitment (BFTNBWAC), a new proposal to solve the Non-Blocking Atomic Commitment (NBAC) problem, where the participants of protocol may fail in a Byzantine way. Our approach is based on virtualization technology, in which we specify a distributed system's architecture that makes possible the detection, masking and confining...
Industry is using power meters to monitor the consumption of energy and achieving cost savings. This monitoring often involves energy metering software with a web interface. However, web applications often have vulnerabilities that can be exploited by cyber-attacks. We present an approach and a tool to solve this problem by analyzing the application source code and automatically inserting fixes to...
The boundary between the trusted inside and the untrusted outside blurs when a company adopts cloud computing. The organization's applications and data are no longer onsite, fundamentally changing the definition of a malicious insider.
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