Daniel Obenshain

Learn More
Networks with homogeneous routing nodes are constantly at risk as any vulnerability found against a node could be used to compromise all nodes. Introducing diversity among nodes can be used to address this problem. With few variants, the choice of assignment of variants to nodes is critical to the overall network resiliency. We present the Diversity(More)
The article describes the design of the Community Seismic Network, which is a dense open seismic network based on low cost sensors. The inputs are from sensors hosted by volunteers from the community by direct connection to their personal computers, or through sensors built into mobile devices. The server is cloud-based for robustness and to dynamically(More)
The increasing number of cyber attacks against critical infrastructures, which typically require large state and long system lifetimes, necessitates the design of systems that are able to work correctly even if part of them is compromised. We present the first practical survivable intrusion tolerant replication system, which defends across space and time(More)
Sandia is an equal opportunity employer. We maintain a drug-free workplace. Learn more >> www.sandia.gov Sandia is a top science and engineering laboratory for national security and technology innovation. Imagine your career here. We also offer exciting internship, coop , post-doctoral and graduate fellowship programs.
—Networks with homogeneous routing nodes are constantly at risk as any vulnerability found against a node could be used to compromise all nodes. Introducing diversity among nodes can be used to address this problem. With few variants, the choice of assignment of variants to nodes is critical to the overall network resiliency. We present the Diversity(More)
In networks such as the IP-based networks that run the Internet, nodes trust one another to properly execute routing and forwarding. When a node is compromised (i.e. Byzantine failure), this trust can be exploited by such compromised nodes to launch routing attacks that can disrupt communication throughout the network. In addition, a compromised node can(More)
—The increasing number of cyber attacks against critical infrastructures, which typically require large state and long system lifetimes, necessitates the design of systems that are able to work correctly even if part of them is compromised. We present the first practical survivable intrusion tolerant replication system, which defends across space and time(More)
As the Internet becomes an important part of the infrastructure our society depends on, it is crucial to construct networks that are able to work even when part of the network is compromised. This paper presents the first practical intrusion-tolerant network service, targeting high-value applications such as monitoring and control of global clouds and(More)