Vienna University of Economics and Business

Displaying 1-40 of 153 results

  • White Papers // Nov 2014

    From Declarative Processes to Imperative Models

    Now-a-days, organizations support their creation of value by explicitly defining the processes to be carried out. Processes are specifically discussed from the angle of simplicity, i.e., how compact and easy to understand they can be represented. In most cases, organizations rely on imperative models which, however, become complex and cluttered...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2014

    ANDRUBIS - 1,000,000 Apps Later: A View on Current Android Malware Behaviors

    Android is the most popular Smartphone operating system with a market share of 80%, but as a consequence, also the platform most targeted by malware. To deal with the increasing number of malicious Android apps in the wild, malware analysts typically rely on analysis tools to extract characteristic information about...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2014

    AndRadar: Fast Discovery of Android Applications in Alternative Markets

    Compared to traditional desktop software, Android applications are delivered through software repositories, commonly known as application markets. Other mobile platforms, such as Apple iOS and BlackBerry OS also use the marketplace model, but what is unique to Android is the existence of a plethora of alternative application markets. This complicates...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2014

    Enter Sandbox: Android Sandbox Comparison

    Expecting the shipment of 1 billion Android devices in 2017, cyber criminals have naturally extended their vicious activities towards Google's mobile operating system. With an estimated number of 700 new Android applications released every day, keeping control over malware is an increasingly challenging task. In recent years, a vast number...

    Provided By Vienna University of Economics and Business

  • White Papers // Jan 2014

    General-Purpose Graphics Processing Units in Service-Oriented Architectures

    Over the last decades, graphics processing units have developed from special-purpose graphics accelerators to general-purpose massively parallel co-processors. In recent years they gained increased traction in high performance computing, as they provide superior computational performance in terms of runtime and energy consumption for a wide range of problems. In this...

    Provided By Vienna University of Economics and Business

  • White Papers // Dec 2013

    Take a Bite - Finding the Worm in the Apple

    When it comes to security risks, especially malware, Mac OS X has the questionable reputation of being inherently safe. While there is a substantial body of research and implementations dealing with malware on Windows and, more recently, Android systems, Mac OS X has received little attention so far. To amend...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2013

    A Framework and Middleware for Application-Level Cloud Bursting on Top of Infrastructure-as-a-Service Clouds

    A core idea of cloud computing is elasticity, i.e., enabling applications to adapt to varying load by dynamically acquiring and releasing cloud resources. One concrete realization is cloud bursting, which is the migration of applications or parts of applications running in a private cloud to a public cloud to cover...

    Provided By Vienna University of Economics and Business

  • White Papers // Jul 2013

    Dowsing for Overflows: A Guided Fuzzer to Find Buffer Boundary Violations

    Dowser is a 'Guided' fuzzer that combines taint tracking, program analysis and symbolic execution to find buffer overflow and underflow vulnerabilities buried deep in a program's logic. The key idea is that analysis of a program lets the users pinpoint the right areas in the program code to probe and...

    Provided By Vienna University of Economics and Business

  • White Papers // Jul 2013

    Interactive Visual Transformation for Symbolic Representation of Time-oriented Data

    Data mining on time-oriented data has many real-world applications, like optimizing shift plans for shops or hospitals, or analyzing traffic or climate. As those data are often very large and multi-variate, several methods for symbolic representation of time-series have been proposed. Some of them are statistically robust, have a lower-bound...

    Provided By Vienna University of Economics and Business

  • White Papers // Jul 2013

    A View To A Kill: WebView Exploitation

    WebView is a technique to mingle web and native applications for mobile devices. The fact that its main incentive requires making data stored on, as well as the functionality of mobile devices, directly accessible to active web content, is not without consequences to security. In this paper, the authors present...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2013

    Evolving Graph Databases Under Description Logic Constraints

    In the setting of graph-structured data, description logics are well suited to impose constraints that capture the semantics of the do-main of interest. When the data evolves as a result of operations carried out by users or applications, it is important to ensure that the satisfaction of the constraints is...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2013

    RESTful Business Process Management in the Cloud

    As more and more business processes are migrated into cloud-based runtimes, there is a need to manage their state to provide support for quality attributes such as elasticity, scalability and dependability. In this paper, the authors discuss how the REST architectural style provides a sensible choice to manage and publish...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2013

    SOA Model for High Availability of Services

    Service-Oriented Architecture (SOA) provides reusability and enables easy functionality integration. Service availability in SOA is important as it is used by safety critical systems, telecommunication systems and business systems. Service unavailability can result in reduced profits, reputation damage and reduced safety. Machine virtualization, clusters and group communication systems are used...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2013

    Minimum Variance Estimation of a Sparse Vector Within the Linear Gaussian Model: An RKHS Approach

    The authors consider minimum variance estimation within the Sparse Linear Gaussian Model (SLGM). A sparse vector is to be estimated from a linearly transformed version embedded in Gaussian noise. Their analysis is based on the theory of Reproducing Kernel Hilbert Spaces (RKHS). After a characterization of the RKHS associated with...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2013

    Efficient Updates of Uncertain Databases

    Uncertain databases have evolved as an active area of database research, surveyed, for example, in. The possible world's semantics is commonly used to deal with uncertain data. Several representation systems for uncertain data-bases have been proposed to provide efficient storage and query facilities for a potentially big number of possible...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2013

    Toward a Cloud-Based Integration of IR Tools

    In this paper, the authors present the case for creating a cloud-based infrastructure for IR. The infrastructure should provide access to multiple components of IR systems and a method to easily integrate them in various configurations, as well as data and parameters used in IR experiments. Workflow tools are promising...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2013

    Securing a Space-Based Service Architecture With Coordination-Driven Access Control

    In distributed applications, multiple autonomous processes need to collaborate in an efficient way. Space-based middleware enables data-driven coordination for these processes via shared tuple spaces that allow a decoupled form of communication. Complex coordination logic may be provided to clients via reusable service components that access such tuple spaces to...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2013

    dAnubis - Dynamic Device Driver Analysis Based on Virtual Machine Introspection

    In the escalating arms race between malicious code and security tools designed to analyze it, detect it or mitigate its impact, malicious code running inside the operating system kernel provides an extremely powerful tool. Kernel-level code can introduce hard to detect backdoors, provide stealth by hiding les, processes or other...

    Provided By Vienna University of Economics and Business

  • White Papers // Feb 2013

    M2M Platform-as-a-Service for Sustainability Governance

    Recently, cloud computing technologies have been employed for large-scale Machine-To-Machine (M2M) systems, as they could potentially offer better solutions for managing monitoring data and analytics applications to support the needs of different consumers. However, there exist complex relationships between monitored objects, monitoring data, analysis features, and stakeholders in M2M that...

    Provided By Vienna University of Economics and Business

  • White Papers // Feb 2013

    Application-Level Performance Monitoring of Cloud Services Based on the Complex Event Processing Paradigm

    Monitoring of applications deployed to Infrastructure-as-a-Service clouds is still an open problem. In this paper, the authors discuss an approach based on the complex event processing paradigm, which allows application developers to specify and monitor high-level application performance metrics. They use the case of a Web 2.0 sentiment analysis application...

    Provided By Vienna University of Economics and Business

  • White Papers // Jan 2013

    Lines of Malicious Code: Insights Into the Malicious Software Industry

    Malicious software installed on infected computers is a fundamental component of online crime. Malware development thus plays an essential role in the underground economy of cyber-crime. Malware authors regularly update their software to defeat defenses or to support new or improved criminal business models. A large body of research has...

    Provided By Vienna University of Economics and Business

  • White Papers // Nov 2012

    Vanity, Cracks and Malware

    Today, a large amount of software products include mechanisms to counter software piracy. However, most protection mechanisms can be easily circumvented by applying soft-ware patches (cracks) or license key generators (keygens) with seemingly no financial incentives. The authors' research shows that the distribution of cracks and keygens not only al-lows...

    Provided By Vienna University of Economics and Business

  • White Papers // Oct 2012

    Automatic SLA Matching and Provider Selection in Grid and Cloud Computing Markets

    Cloud computing is a novel computing paradigm that offers data, software, and hardware services in a manner similar to traditional utilities such as water, electricity, and telephony. Usually, in Cloud and Grid computing, contracts between traders are established using Service Level Agreements (SLAs), which include objectives of service usage. However,...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2012

    Conflict Visualization for Evolving UML Models

    The urgent demand for supporting teamwork and continuous evolution of software models triggered intensive research on optimistic version control systems for models. State-of-the-art model versioning approaches primarily focus on detecting changes and conflicts between concurrently evolved versions of a model. However, techniques for conflict visualization have been hardly investigated yet....

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2012

    Optimized Execution of Business Processes on Crowdsourcing Platforms

    Crowdsourcing in enterprises is a promising approach for organizing a flexible workforce. Recent developments show that the idea gains additional momentum. However, an obstacle for widespread adoption is the lack of an integrated way to execute business processes based on a crowdsourcing platform. The main difference compared to traditional approaches...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2012

    Cloud Security and Privacy in the Light of the 2012 EU Data Protection Regulation

    The essential characteristics of cloud computing such as elasticity or broad network access provide many economic benefits for their users, but with these benefits also many security and privacy risks come along. These risks can be generally classified into legal and technical risks. The upcoming general data protection regulation by...

    Provided By Vienna University of Economics and Business

  • White Papers // Aug 2012

    Virtualizing Software and Humans for Elastic Processes in Multiple Clouds - A Service Management Perspective

    There is a growing trend of combining human-based computation with machine-based computation to solve complex problems which cannot be answered with machine-based computation alone. From the computing perspective, integrating machine-based computing elements with human-based computing elements and provisioning them under the same model will facilitate the resource elasticity required by...

    Provided By Vienna University of Economics and Business

  • White Papers // Aug 2012

    Self-Adaptive and Resource-Efficient SLA Enactment for Cloud Computing Infrastructures

    Cloud providers aim at guaranteeing Service Level Agreements (SLAs) in a resource-efficient way. This, amongst others, means that resources of Virtual (VMs) and Physical Machines (PMs) have to be autonomically allocated responding to external influences as workload or environmental changes. Thereby, Workload Volatility (WV) is one of the crucial factors...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2012

    Data Cache Organization for Accurate Timing Analysis

    Caches are essential to bridge the gap between the high latency main memory and the fast processor pipeline. Standard processor architectures implement two first-level caches to avoid a structural hazard in the pipeline: an instruction cache and a data cache. For tight worst-case execution times it is important to classify...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2012

    Identifying Incompatible Implementations of Industry Standard Service Interfaces for Dependable Service-Based Applications

    In this paper, the authors study fault localization techniques for identification of incompatible configurations and implementations in Service-Based Applications (SBAs). They consider SBAs with abstract service interfaces that integrate multiple concrete service implementations from various providers. Practice has shown that standardized interfaces alone do not guarantee compatibility of services originating...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2012

    Enhanced Sharing and Privacy in Collaborative Virtual Teams

    Privacy concerns keep users from sharing required information in a collaborative environment. There is a need of privacy preserving methods that can enhance flow of information among collaborating users in dynamic teams without compromising their privacy. The authors describe a user-defined role-based sharing control model and architecture that uses hybrid...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Ethics in Security Research Which Lines Should Not Be Crossed?

    Recently, several research papers in the area of information security were published that may or may not be considered unethical. Looking at these borderline cases is relevant as today's research papers will influence how young researchers conduct their research. In this paper, the authors discuss fundamental ethical principles and their...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Automation Possibilities in Information Security Management

    Information security management, as defined in ISO 27001, deals with establishing, implementing, operating, monitoring, reviewing, maintaining, and improving an information security management system. This paper provides an analysis about the automation possibilities in information security management. The analysis takes into account the potential of using security ontologies in risk management,...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Tor HTTP Usage and Information Leakage

    This paper analyzes the web browsing behavior of Tor users. By collecting HTTP requests the authors show which websites are of interest to Tor users and they determined an upper bound on how vulnerable Tor users are to sophisticated de-anonymization attacks: up to 78 % of the Tor users do...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Accurate SINR Estimation Model for System Level Simulation of LTE Networks

    This paper presents an SINR prediction model for LTE systems with the aim of improving the accuracy of physical layer models used for higher-than-physical-level simulations. This physical layer SINR abstraction for zero-forcing receivers takes channel estimation errors into account. It allows for the calculation of the post-equalization receive SINR of...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Adaptive Channel Direction Quantization Based on Spherical Prediction

    In this paper, the authors present algorithms for the quantization of a correlated unit norm random vector process. Such algorithms are important, e.g., for channel vector quantization in wireless communication systems. Starting from a quantization codebook that uniformly quantizes the unit sphere, they propose to iteratively adapt the codebook to...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Joint Network-Channel Coding for the Asymmetric Multiple-Access Relay Channel

    In this paper, the authors consider the time-division Multiple Access Relay Channel (MARC). They propose a low-complexity compress-and-forward-based transmission scheme that consists of a scalar quantization of Log-Likelihood Ratios (LLRs), followed by a suitably defined network code. This scheme is well suited also for asymmetric source-relay channel conditions. They use...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Workflow-Based Composition and Testing of Combined e-services and components

    Information systems are increasingly built using component models such as Enterprise Java Beans, COM+, or CORBA objects. Dynamically aggregated and composed Web services can be seen as a newly emerging research area for Service Oriented Architectures, which are combined with components. The authors' paper presents three main arguments: that composition...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Semantic Inter-Organizational Performance Analysis Using the Balanced Scorecard Methodology

    Evaluating Inter-Organizational Relationships (IORs) is important in today's businesses for increasing competitiveness and business potential. Typically, IORs are measured by high-level Key Performance Indicators (KPIs) such as trust, knowledge sharing, and others. However, these high-level KPIs are difficult to be measured quantitatively. It is therefore difficult to determine IORs and...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2012

    Energy Efficient Service Delivery in Clouds in Compliance with the Kyoto Protocol

    Cloud computing is revolutionizing the ICT landscape by providing scalable and efficient computing resources on demand. The ICT industry - especially data centers, are responsible for considerable amounts of CO2 emissions and will very soon be faced with legislative restrictions, such as the Kyoto protocol, defining caps at different organizational...

    Provided By Vienna University of Economics and Business

  • White Papers // Feb 2010

    The Great Recession Versus The Great Depression: Stylized Facts On Siblings That Were Given Different Foster Parents

    This paper compares the depth of the Recent Crisis and the Great Depression. The authors use a new data set to compare the drop in activity in the industrialized countries for seven activity indicators. This is done under the assumption that the Recent Crisis leveled off in mid-2009 for production...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2010

    Do We Need Any More Hierarchical Structures? Combining Vertical And Shared Leadership Considering The Organizational Culture, Structures And Processes

    In spite of decades of leadership research and numerous leadership theories no unequivocal recipe for success could be found for the leading of employees. Complex tasks, increasing competitive pressure and insecurity complicate this because innovative and flexible activities are not possible in rigid hierarchical structures. The expectations of highly qualified...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2010

    Leadership And Public Service Motivation In A Weberian Public Administration - A German-Austrian Comparative Perspective

    A central question for the future of applied Public Service Motivation (PSM) research is whether PSM influences leadership behavior and to which extent. To address this question, the authors focus on public sector executives in two German speaking countries with their specific Weberian legalistic Rechtsstaat-tradition, characterized by a quite distinct...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Accurate SINR Estimation Model for System Level Simulation of LTE Networks

    This paper presents an SINR prediction model for LTE systems with the aim of improving the accuracy of physical layer models used for higher-than-physical-level simulations. This physical layer SINR abstraction for zero-forcing receivers takes channel estimation errors into account. It allows for the calculation of the post-equalization receive SINR of...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Adaptive Channel Direction Quantization Based on Spherical Prediction

    In this paper, the authors present algorithms for the quantization of a correlated unit norm random vector process. Such algorithms are important, e.g., for channel vector quantization in wireless communication systems. Starting from a quantization codebook that uniformly quantizes the unit sphere, they propose to iteratively adapt the codebook to...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2012

    Energy Efficient Service Delivery in Clouds in Compliance with the Kyoto Protocol

    Cloud computing is revolutionizing the ICT landscape by providing scalable and efficient computing resources on demand. The ICT industry - especially data centers, are responsible for considerable amounts of CO2 emissions and will very soon be faced with legislative restrictions, such as the Kyoto protocol, defining caps at different organizational...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Joint Network-Channel Coding for the Asymmetric Multiple-Access Relay Channel

    In this paper, the authors consider the time-division Multiple Access Relay Channel (MARC). They propose a low-complexity compress-and-forward-based transmission scheme that consists of a scalar quantization of Log-Likelihood Ratios (LLRs), followed by a suitably defined network code. This scheme is well suited also for asymmetric source-relay channel conditions. They use...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2012

    Users in Cells: a Data Traffic Analysis

    The authors present a large-scale cell based measurement analysis of the user behavior in a live operational HSDPA network. The motivations are: first, to understand the statistical properties of users in cells for refining network planning procedures; and second, to provide realistic traffic models for simulations of cellular packet-oriented networks....

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2013

    Securing a Space-Based Service Architecture With Coordination-Driven Access Control

    In distributed applications, multiple autonomous processes need to collaborate in an efficient way. Space-based middleware enables data-driven coordination for these processes via shared tuple spaces that allow a decoupled form of communication. Complex coordination logic may be provided to clients via reusable service components that access such tuple spaces to...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2012

    An Interoperable and Self-adaptive Approach for SLA-based Service Virtualization in Heterogeneous Cloud Environments

    Cloud computing is a newly emerged computing infrastructure that builds on the latest achievements of diverse research areas, such as Grid computing, Service-oriented computing, business process management and virtualization. An important characteristic of Cloud-based services is the provision of non-functional guarantees in the form of Service Level Agreements (SLAs), such...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2013

    Minimum Variance Estimation of a Sparse Vector Within the Linear Gaussian Model: An RKHS Approach

    The authors consider minimum variance estimation within the Sparse Linear Gaussian Model (SLGM). A sparse vector is to be estimated from a linearly transformed version embedded in Gaussian noise. Their analysis is based on the theory of Reproducing Kernel Hilbert Spaces (RKHS). After a characterization of the RKHS associated with...

    Provided By Vienna University of Economics and Business

  • White Papers // May 2012

    Semantic Inter-Organizational Performance Analysis Using the Balanced Scorecard Methodology

    Evaluating Inter-Organizational Relationships (IORs) is important in today's businesses for increasing competitiveness and business potential. Typically, IORs are measured by high-level Key Performance Indicators (KPIs) such as trust, knowledge sharing, and others. However, these high-level KPIs are difficult to be measured quantitatively. It is therefore difficult to determine IORs and...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2008

    Modeling Human Aspects of Business Processes - A View-Based, Model-Driven Approach

    Human participation in business processes needs to be addressed in process modeling. BPEL4People with WS-HumanTask covers this concern in the context of BPEL. Bound to specific workflow technology this leads to a number of problems. Firstly, maintaining and migrating processes to new or similar technologies is expensive. Secondly, the low-level,...

    Provided By Vienna University of Economics and Business

  • White Papers // Aug 2006

    Testing Event-Driven Business Processes

    Today's business climate requires the authors to constantly evolve IT strategies responding to new opportunities or threats. While the fundamentals of IT-reliability, availability, security and manageability are still crucial, rapid results are mandatory for business success. These business challenges can be solved by acting with agility - striking the proper...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2007

    Extending the EPC and the BPMN with Business Process Goals and Performance Measures

    The Event-Driven Process Chain (EPC) and the Business Process Modeling Notation (BPMN) are designed for modeling business processes, but do not yet include any means for modeling process goals and their measures, and they do not have a published metamodel. The authors derive a meta-model for both languages, and extend...

    Provided By Vienna University of Economics and Business

  • White Papers // Jan 2011

    Risk-Aware Business Process Management - Establishing the Link Between Business and Security

    Companies face the challenge to effectively and efficiently perform their business processes as well as to guarantee their continuous operation. To meet the economic requirements, companies predominantly apply business process management concepts. The substantial consideration of robustness and continuity of operations is performed in other domains such as risk or...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2010

    From the Resource to the Business Process Risk Level

    Although a variety of Information Security Risk Management (ISRM) approaches have been pro-posed, well-founded methods that provide an answer to the following question are still missing: How can the risk level of a business process be determined by taking the risk levels of the involved resources into account? In this...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2006

    Secure Business Process Management: A Roadmap

    The security of corporate business processes is crucial for the business success of companies. Existing Business Process Management methodologies barely consider security and dependability objectives. Business processes and security issues are developed separately and often do not follow the same strategy. Growing business integration and legal requirements raise the need...

    Provided By Vienna University of Economics and Business

  • White Papers // Nov 2009

    A Reference Model for Risk-Aware Business Process Management

    The major contribution of this paper is the introduction of a reference model which is capable to consider information acquired within the business process management and risk management domain. The central objective of the reference model is to enable the modeling of risk aspects in such a way that it...

    Provided By Vienna University of Economics and Business

  • White Papers // Jul 2009

    An Evaluation of Mapping Strategies for Core Components

    Electronic Data Interchange (EDI) is inevitable in enabling successful collaborations between different business partners. Exchanging information electronically requires standardized formats for information exchange. There exist a variety of standards including bottom-up standards as well as top-down standards. However, business partners may utilize different standards resulting in a loss of interoperability....

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2012

    Optimized Execution of Business Processes on Crowdsourcing Platforms

    Crowdsourcing in enterprises is a promising approach for organizing a flexible workforce. Recent developments show that the idea gains additional momentum. However, an obstacle for widespread adoption is the lack of an integrated way to execute business processes based on a crowdsourcing platform. The main difference compared to traditional approaches...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2012

    Enhanced Sharing and Privacy in Collaborative Virtual Teams

    Privacy concerns keep users from sharing required information in a collaborative environment. There is a need of privacy preserving methods that can enhance flow of information among collaborating users in dynamic teams without compromising their privacy. The authors describe a user-defined role-based sharing control model and architecture that uses hybrid...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2008

    Business Documents in a Service Oriented Context

    In a SOA based inter-organizational business process different business documents are exchanged in an agreed order between business partners. Although several standards for the definition of process choreography exist now-a-days, the precise and unambiguous definition of the exchanged business documents is still an open research task. However, if the business...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2009

    A Holistic Methodology for Model-Driven B2B Integration: From Business Values Over Business Collaborations to Deployment Artifacts

    Business-To-Business (B2B) electronic commerce based on the principles of Electronic Data Interchange (EDI) systems has been conducted for a long time. In recent years, the authors observe a switch to a rather business process-based thinking for implementing inter-organizational systems. UN/CEFACT's Modeling Methodology (UMM) - which the author co-authored is considered...

    Provided By Vienna University of Economics and Business

  • White Papers // Oct 2006

    Ontological Mapping of Common Criteria's Security Assurance Requirements

    The Common Criteria (CC) for Information Technology Security Evaluation provides comprehensive guidelines for the evaluation and certification of IT security regarding data security and data privacy. Due to the very complex and time-consuming certification process a lot of companies abstain from a CC certification. The authors created the CC Ontology...

    Provided By Vienna University of Economics and Business

  • White Papers // Mar 2006

    Security and Privacy Models in Triple Space

    This deliverable focuses on the identification of security requirements and possible solutions for a Triple Space computing environment. It analyses both well-known security issues of common distributed systems and security issues specific to TSC. After having complemented the requirements with insights acquired by the investigation of several Triple Space use...

    Provided By Vienna University of Economics and Business

  • White Papers // Oct 2011

    Rozzle: De-Cloaking Internet Malware

    In recent years, attacks that exploit vulnerabilities in browsers and their associated plugins have increased significantly. These attacks are often written in JavaScript and literally millions of URLs contain such malicious content. While static and runtime methods for malware detection have been proposed in the literature, both on the client...

    Provided By Vienna University of Economics and Business

  • White Papers // Jul 2013

    Dowsing for Overflows: A Guided Fuzzer to Find Buffer Boundary Violations

    Dowser is a 'Guided' fuzzer that combines taint tracking, program analysis and symbolic execution to find buffer overflow and underflow vulnerabilities buried deep in a program's logic. The key idea is that analysis of a program lets the users pinpoint the right areas in the program code to probe and...

    Provided By Vienna University of Economics and Business

  • White Papers // Jan 2013

    Lines of Malicious Code: Insights Into the Malicious Software Industry

    Malicious software installed on infected computers is a fundamental component of online crime. Malware development thus plays an essential role in the underground economy of cyber-crime. Malware authors regularly update their software to defeat defenses or to support new or improved criminal business models. A large body of research has...

    Provided By Vienna University of Economics and Business

  • White Papers // Nov 2012

    Vanity, Cracks and Malware

    Today, a large amount of software products include mechanisms to counter software piracy. However, most protection mechanisms can be easily circumvented by applying soft-ware patches (cracks) or license key generators (keygens) with seemingly no financial incentives. The authors' research shows that the distribution of cracks and keygens not only al-lows...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2010

    Boosting Sphere Decoding Speed Through Graphic Processing Units

    Graphic Processing Units (GPUs) have evolved to provide a massive computational power. In contrast to Central Processing Units, GPUs are so-called many-core processors with hundreds of cores capable of running thousands of threads in parallel. This parallel processing power can accelerate the simulation of communication systems. In this paper, the...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2010

    Carrier Frequency Synchronization in the Downlink of 3GPP LTE

    In this paper, the authors investigate carrier frequency synchronization in the downlink of 3GPP Long Term Evolution (LTE). A complete carrier frequency offset estimation and compensation scheme based on standardized synchronization signals and reference symbols is presented. The estimation performance in terms of mean square error is derived analytically and...

    Provided By Vienna University of Economics and Business

  • White Papers // Nov 2011

    Optimal Pilot Symbol Power Allocation in Multi-Cell Scenarios of LTE

    Current systems for cellular wireless communication are designed for coherent detection. Therefore, the channel estimator is a crucial part of a receiver. UMTS Long Term Evolution (LTE) provides a possibility to change the power radiated at the pilot subcarriers relative to those that of the data subcarriers. Clearly, this additional...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2009

    Testbedding MIMO HSDPA and WiMAX

    Modern wireless communication systems employ MIMO and feedback - two properties that make it especially difficult to measure the performance of such systems with reasonable effort in actual outdoor scenarios. In this paper, the authors will present a time, cost, and manpower efficient measurement approach to evaluate the throughput achieved...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2009

    MIMO HSDPA Throughput Measurement Results in an Urban Scenario

    In this paper, the authors report on results of MIMO High Speed Downlink Packet Access (HSDPA) throughput measurements. These measurements were carried out in an urban scenario. Besides the standard compliant SISO and two transmit antenna schemes, they defined and measured also a four antenna scheme. In all throughput measurements...

    Provided By Vienna University of Economics and Business

  • White Papers // Aug 2009

    Simulating the Long Term Evolution Physical Layer

    Research and development of signal processing algorithms for UMTS Long Term Evolution (LTE) requires a realistic, flexible, and standard-compliant simulation environment. To facilitate comparisons with work of other research groups such a simulation environment should ideally be publicly available. In this paper, the authors present a MATLAB-based down-link physical-layer simulator...

    Provided By Vienna University of Economics and Business

  • White Papers // Jun 2011

    Interference Alignment in the Partially Connected K-User MIMO Interference Channel

    The authors consider interference alignment in the partially connected K-user MIMO Interference Channel (IC). Conversely to the fully-connected case, they show that interference alignment can be achievable for an arbitrary number of users K in the network, while the per-user signaling dimension remains fixed, provided that the number of interference...

    Provided By Vienna University of Economics and Business

  • White Papers // Sep 2012

    Conflict Visualization for Evolving UML Models

    The urgent demand for supporting teamwork and continuous evolution of software models triggered intensive research on optimistic version control systems for models. State-of-the-art model versioning approaches primarily focus on detecting changes and conflicts between concurrently evolved versions of a model. However, techniques for conflict visualization have been hardly investigated yet....

    Provided By Vienna University of Economics and Business

  • White Papers // Aug 2012

    Self-Adaptive and Resource-Efficient SLA Enactment for Cloud Computing Infrastructures

    Cloud providers aim at guaranteeing Service Level Agreements (SLAs) in a resource-efficient way. This, amongst others, means that resources of Virtual (VMs) and Physical Machines (PMs) have to be autonomically allocated responding to external influences as workload or environmental changes. Thereby, Workload Volatility (WV) is one of the crucial factors...

    Provided By Vienna University of Economics and Business

  • White Papers // Apr 2012

    Cloud Computing for Education and Research in Developing Countries

    Recently cloud computing has offered attractive solutions for academic and research institutions due to several reasons. In this chapter, the authors present a study of how cloud computing can be used for research and teaching activities in higher educational and research institutions in developing countries. Instead of focusing on cloud...

    Provided By Vienna University of Economics and Business