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Radio waves are the medium used by sensors to communicate and exchange data. The unconstrained accessibility to any information carried over this medium is a security issue in many sensor-based applications. Ensuring protected wireless communications is ...

The popularity of wide-area computer services has generated a compelling need for efficient algorithms that provide high reliability. Byzantine fault-tolerant (BFT) algorithms can be used with this purpose because they allow replicated systems to ...

Field Programmable Gate Arrays (FPGA) offer many advantages to the designers of systems including high predictability in terms of resource usage and the ability to process certain (parallel) functions and data streams efficiently and quickly. To date an ...

Reducing the number of latent software defects is a development goal that is particularly applicable to high assurance software systems. For such systems, the software measurement and defect data is highly skewed toward the not-fault-prone program ...

The Service Availability Forum (SA Forum) is a consortium of several telecommunications and computing companies that defines standard solutions for high availability platforms. One of the most important SA Forum services is the Availability Management ...

The increasing demand of quality presses towards more specific requirements, tighter constraints, and higher standards. It is thus necessary to provide new paradigms, techniques, and tools to adequately model and evaluate complex systems. This paper ...

A monitor is a commonly used synchronization construct in multithreaded programs. Ensuring the correctness of each monitor in a multithreaded program is a critical step towards ensuring the correctness of the entire program. A monitor’s correctness can ...

Dataflow testing of programs ensures the execution of data dependencies between locations in the code (1) where variables are assigned values, and (2) where these definitions are used. Such data dependencies are called Def-Use Associations (DUAs). In an ...

At Airbus, flight control software is developed using SCADE formal models, from which 90% of the code can be generated. Having a formal design leaves open the possibility of introducing model checking techniques. But, from our analysis of cases ...

A hybrid Petri net formalism that is specifically tailored towards so-called fluid critical infrastructures is introduced, allowing for timed, generally distributed and fluid transitions. Such models are analyzed with Parametric Reachability Analysis, ...

We use the probabilistic model checker PRISM to formally model and analyze the highly publicized Kaminsky DNS cache-poisoning attack. DNS (Domain Name System) is an internet-wide, hierarchical naming system used to translate domain names such as ...

Safety is now a major concern in many computer based systems and more particularly for autonomous systems such as service robots in physical contact with humans. The traditional approach to analyze the safety of such systems is to use risk assessment ...

In this paper we demonstrate the error-prone status of the UML 2.3 metamodel relating to state machines. We consequently provide a corrected version based on formal proofs written and processed with the help of the Coq system prover. The purpose of the ...

Model-driven development (MDD) and verification approaches are highly desirable in the development of (safety-critical) embedded systems, since they help to identify functional or non-functional issues from the early development stage when verification ...

In model-based safety analysis both qualitative aspects i.e. what must go wrong for a system failure) and quantitative aspects (i.e. how probable is a system failure) are very important. For both aspects methods and tools are available. However, until ...

Vehicle control system development is a complex process, involving multiple stages and multiple groups in different disciplines. Constructing a high-integrity configuration for a product with a large number of control functions is very challenging in ...

Many research and development efforts have been devoted towards the design of dependable storage systems, but the effort in evaluating and comparing different designs for widely distributed environment is limited. In this paper, we develop models to ...

The drawback of classical software random testing is low efficiency to find failure-causing inputs, because it requires a large number of test cases compared to a family of partition testing. This paper proposes a software random testing scheme based on ...

Reliability of web applications depends on reliability of the application itself as well as the underlying application server, external and internal services. Many research works have been conducted on reliability modeling of service-based software, ...

Safety assessment methods are typically based on the reliability of the single components making a system. A different notion of safety as an emergent property of the system taken as a whole is however emerging. The current state-based modeling paradigm ...

The Prospec software tool facilitates the construction of formal specifications in LTL by automating Dwyer’s Specification Pattern System as extended by Mondragon and Salamah. The LTL generation has been verified through the automated creation of a ...

This abstract discusses our current work on the collection of patterns of dependability cases for a software/system lifecycle. We also describe a prototype implementation of a dependability case editor called, which has a pattern selection function.