Abstract The development of cloud computing services is speeding up the rate in which the
organizations outsource their computational services or sell their idle computational …

Attacks against distributed systems frequently start at the network layer by gathering network
related information (such as open TCP ports) and continue on by exhausting resources, or …

This paper presents the first hierarchical byzantine fault-tolerant replication architecture
suitable to systems that span multiple wide-area sites. The architecture confines the effects …

An important goal of software testing is to achieve at least high structural coverage. To
reduce the manual efforts of producing such high-covering test inputs, testers or developers …

This paper presents the first hierarchical Byzantine fault-tolerant replication architecture
suitable to systems that span multiple wide area sites. The architecture confines the effects …

Nowadays, more and more information systems are connected to the Internet and offer Web
interfaces to the general public or to a restricted set of users. Such openness makes them …

While providing some resistance against cyberattacks, current approaches to securing
networked and distributed information systems are mainly concerned with static prevention …

Many techniques and mechanisms exist today, some COTS, others less mature research
products that can be used to deflect, detect, or even recover from specific types of cyber …

Constructing logical machines out of collections of physical machines is a well-known
technique for improving the robustness and fault tolerance of distributed systems. We …

MAFTIA was a three-year European research project that explored the use of fault-tolerance
techniques to build intrusion-tolerant systems. The MAFTIA architecture embodies a number …