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检索条件"任意字段=14th ACM Symposium on Access Control Models and Technologies"

共 462 条记录，以下是61-70 订阅

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An access control Concept for Novel Automotive HMI Systems 14

An Access Control Concept for Novel Automotive HMI Systems

引用

19th acm symposium on access control models and technologies (SacmAT)

作者： Gansel, Simon Schnitzer, Stephan Gilbeau-Hammoud, Ahmad Friesen, Viktor Duerr, Frank Rothermel, Kurt Maihoefer, Christian Daimler AG Syst Architecture & Platforms Dept Mercedes Benz Cars Div Sindelfingen Germany Univ Stuttgart Inst Parallel & Distributed Syst Stuttgart Germany

ISBN: (纸本)9781450329392

the relevance of graphical functions in vehicular applications has increased significantly during the few last years. Modern cars are equipped with multiple displays used by different applications such as speedometer or navigation system. However, so far applications are restricted to using dedicated displays. In order to increase flexibility, the requirement of sharing displays between applications has emerged. Sharing displays leads to safety and security concerns since safety-critical applications as the dashboard warning lights share the same displays with uncritical or untrusted applications like the navigation system or third-party applications. To guarantee the safe and secure sharing of displays, we present a formal model for defining and controlling the access to display areas in this paper. We prove the validity of this model, and present a proof-of-concept

关键词： access control State-based Model Automotive Windows

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Policy models to Protect Resource Retrieval 14

Policy Models to Protect Resource Retrieval

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19th acm symposium on access control models and technologies (SacmAT)

作者： Vijayakumar, Hayawardh Ge, Xinyang Jaeger, Trent Penn State Univ Dept Comp Sci & Engn Syst & Internet Infrastruct Secur Lab University Pk PA 16802 USA

ISBN: (纸本)9781450329392

Processes need a variety of resources from their operating environment in order to run properly, but adversary may control the inputs to resource retrieval or the end resource itself, leading to a variety of vulnerabilities. Conventional access control methods are not suitable to prevent such vulnerabilities because they use one set of permissions for all system call invocations. In this paper, we define a novel policy model for describing when resource retrievals are unsafe, so they can be blocked. this model highlights two contributions: (1) the explicit definition of adversary models as adversarial roles, which list the permissions that dictate whether one subject is an adversary of another, and (2) the application of data-flow to determine the adversary control of the names used to retrieve resources. An evaluation using multiple adversary models shows that data-flow is necessary to authorize resource retrieval in over 90% of system calls. By making adversary models and the adversary accessibility of all aspects of resource retrieval explicit, we can block resource access attacks system-wide.

关键词： Resource access Attacks Protection

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Declarative access control for Aggregations of Multiple Ownership Data 20

Declarative Access Control for Aggregations of Multiple Owne...

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25th acm symposium on access control models and technologies (SacmAT)

作者： Rosa, Marco Di Cerbo, Francesco Lozoya, Rocio Cabrera SAP Secur Res Sophia Antipolis France Univ Bergamo Sophia Antipolis France

ISBN: (纸本)9781450375689

Data aggregation operations are popular in domains like data analytics, machine learning and artificial intelligence. However, despite the availability of information, situations like fragmented ownership and legal frameworks hinder data processing, requiring companies to design complex human-driven processes in order to gather, aggregate, and process data in a compliant way. Our proposal addresses this lack of automation with an access control mechanism extending XacmL, an access control standard with language and implementation, to regulate operations with multiple data policies.

关键词： access control Data Aggregation Authorization Policies

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Path Conditions and Principal Matching: A New Approach to access control 14

Path Conditions and Principal Matching: A New Approach to Ac...

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19th acm symposium on access control models and technologies (SacmAT)

作者： Crampton, Jason Sellwood, James Royal Holloway Univ London Egham Surrey England

ISBN: (纸本)9781450329392

Traditional authorization policies are user-centric, in the sense that authorization is defined, ultimately, in terms of user identities. We believe that this user-centric approach is inappropriate for many applications, and that what should determine authorization is the relationships that exist between entities in the system. While recent research has considered the possibility of specifying authorization policies based on the relationships that exist between peers in social networks, we are not aware of the application of these ideas to general computing systems. We develop a formal access control model that makes use of ideas from relationship-based access control and a two-stage method for evaluating policies. Our policies are defined using path conditions, which are similar to regular expressions. We define semantics for path conditions, which we use to develop a rigorous method for evaluating policies. We describe the algorithm required to evaluate policies and establish its complexity. Finally, we illustrate the advantages of our model using an example and describe a preliminary implementation of our algorithm.

关键词： access control path condition relationship principal matching authorization

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Mutual Authorizations: Semantics and Integration Issues 19

Mutual Authorizations: Semantics and Integration Issues

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24th acm symposium on access control models and technologies (SacmAT)

作者： Suntaxi, Gabriela El Ghazi, Aboubakr Achraf Boehm, Klemens Karlsruhe Inst Technol Karlsruhe Germany

ISBN: (纸本)9781450367530

Studies in fields like psychology and sociology have revealed that reciprocity is a powerful determinant of human behavior. None of the existing access control models however captures this reciprocity phenomenon. In this paper, we introduce a new kind of grant, which we call mutual, to express authorizations that actually do this, i.e., users grant access to their resources only to users who allow them access to theirs. We define the syntax and semantics of mutual authorizations and show how this new grant can be included in the Role-Based access control model, i.e., extend RBAC with it.

关键词： access control models reciprocity mutual authorizations

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Deploying access control Enforcement for IoT in the Cloud-Edge Continuum with the help of the CAP theorem 20

Deploying Access Control Enforcement for IoT in the Cloud-Ed...

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25th acm symposium on access control models and technologies (SacmAT)

作者： Ahmad, Tahir Morelli, Umberto Ranise, Silvio FBK ICT Secur & Trust Unit Trento Italy Univ Genoa DIBRIS Genoa Italy

ISBN: (纸本)9781450375689

the CAP theorem is used by distributed system practitioners to investigate the necessary trade-offs in the design and development of distributed systems, mainly databases and web applications. In this paper, we use it to reason about access control systems designed for the Internet of things (IoT). We validate our approach by experimentally investigating alternative architectural designs to enforce access control in a smart lock system using the cloud-edge IoT platform offered by Amazon Web Services. We discuss the trade-off between security and performance that may help IoT designers choose the most suitable architecture supporting their requirements.

关键词： access control Internet of things CAP theorem

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An Actor-Based, Application-Aware access control Evaluation Framework 14

An Actor-Based, Application-Aware Access Control Evaluation ...

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19th acm symposium on access control models and technologies (SacmAT)

作者： Garrison, William C., III Lee, Adam J. Hinrichs, Timothy L. Univ Pittsburgh Dept Comp Sci Pittsburgh PA 15260 USA VMware Inc Palo Alto CA USA

ISBN: (纸本)9781450329392

To date, most work regarding the formal analysis of access control schemes has focused on quantifying and comparing the expressive power of a set of schemes. Although expressive power is important, it is a property that exists in an absolute sense, detached from the application context within which an access control scheme will ultimately be deployed. By contrast, we formalize the access control suitability analysis problem, which seeks to evaluate the degree to which a set of candidate access control schemes can meet the needs of an application-specific workload. this process involves both reductions to assess whether a scheme is capable of implementing a workload (qualitative analysis), as well as cost analysis using ordered measures to quantify the overheads of using each candidate scheme to service the workload (quantitative analysis). We formalize the two-facet suitability analysis problem, which formally describes this task. We then develop a mathematical framework for this type of analysis, and evaluate this framework both formally, by quantifying its efficiency and accuracy properties, and practically, by exploring an academic program committee workload.

关键词： access control Suitability analysis Actor-based simulation

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Active Learning of Relationship-Based access control Policies 20

Active Learning of Relationship-Based Access Control Policie...

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25th acm symposium on access control models and technologies (SacmAT)

作者： Iyer, Padmavathi Masoumzadeh, Amirreza SUNY Albany Albany NY 12222 USA

ISBN: (纸本)9781450375689

Understanding access control policies is essential in understanding the security behavior of systems. However, often times, a complete and accurate specification of the enforced access control policy in a system is not available. In fact, scale and complexity of a system, or unavailability of its source code, may prevent users and even its developers from having access to such accurate specification. In this paper, we propose a novel, systematic approach for learning access control policies where target systems are treated as black boxes. In particular, we show how we can construct a deterministic finite automaton (DFA) characterizing the relationship-based access control (ReBAC) policy of a system by interacting with its access control engine using minimal number of access requests. Our experiments on realistic application scenarios and their promising results demonstrate the feasibility, scalability and efficiency of our learning approach.

关键词： relationship-based access control authorization black box model learning active learning

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Poster: A Flexible Relationship-Based access control Policy Generator 22

Poster: A Flexible Relationship-Based Access Control Policy ...

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27th acm symposium on access control models and technologies (SacmAT)

作者： Clark, Stanley Yakovets, Nikolay Fletcher, George H. L. Zannone, Nicola Eindhoven Univ Technol Eindhoven Netherlands

ISBN: (纸本)9781450393577

A plethora of Relationship-Based access control (ReBAC) models have been proposed, varying in the types of policies they can express. this fragmentation has stifled the creation of a benchmark to directly compare the performance of ReBAC systems based on their common supported policies. To solve this problem, we propose RACON, a schema-driven, customisable ReBAC policy generator. RACON generates policies in an intermediate language subsuming the features required to encode existing ReBAC models. this language can subsequently be translated to popular ReBAC policy languages through an extensible translation module. Taking a view of ReBAC policies as graph queries, we implement translations into two popular graph query languages, namely Cypher and SPARQL.

关键词： Policy generation Benchmark Relationship-Based access control

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A meta model for access control: Why is it needed and Is it even possible to achieve? 08

A meta model for access control: Why is it needed and Is it ...

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13th acm symposium on access control models and technologies, SacmAT'08

作者： Ferraiolo, David Atluri, Vijay National Institute of Standards and Technology Rutgers University

No abstract available

ISBN: (纸本)9781605581293

No abstract available

关键词： Security

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