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Investigation of Suitable MAC Protocols for Optical Wireless Body-Area Networks

Investigation of Suitable MAC Protocols for Optical Wireless...

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International symposium on Communication Systems, Networks and Digital Signal Processing, CNSDSP

作者： Christos Giachoudis Mohammad Ali Khalighi Stanislav Zvanovec Vasilis K. Papanikolaou Sotiris A. Tegos George K. Karagiannidis Aix-Marseille University CNRS Centrale Med Fresnel Institute Marseille France Faculty of Electrical Engineering Czech Technical University in Prague Prague Czech Republic Erlangen-Nuremberg University (FAU) Erlangen Germany Aristotle University of Thessaloniki Thessaloniki Greece Lebanese American University (LAU) Beirut Lebanon

ISBN: (数字)9798350348743

ISBN: (纸本)9798350348750

We consider the use of optical wireless data transmission from the medical nodes in wireless body-area networks (WBANs) for monitoring a patient's vital signs. To investigate efficient medium-access control (MAC) protocols, we contrast the two developed standards of IEEE 802.15.6 and IEEE 802.15.7 from the points of view of energy efficiency and latency. the first standard was originally developed for radio-frequency signal transmission, whereas the latter is based on the optical wireless technology. the comparison of the two protocols is made using the Castalia simulator and realistic optical WBAN channel models from previous work. this study also offers valuable insights into the performance of the latest IEEE 802.15.13 standard, designed for optical WBANs.

关键词： Wireless communication IEEE 802.15 Standard Radio frequency Biomedical optical imaging Protocols Media access control Optical fiber networks

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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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Accept - Maybe - Decline: Introducing Partial Consent for the Permission-based access control Model of Android 20

Accept - Maybe - Decline: Introducing Partial Consent for th...

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

作者： Momen, Nurul Bock, Sven Fritsch, Lothar Karlstad Univ Karlstad Sweden Tech Univ Berlin Berlin Germany

ISBN: (纸本)9781450375689

the consent to personal data sharing is an integral part of modern access control models on smart devices. this paper examines the possibility of registering conditional consent which could potentially increase trust in data sharing. We introduce an indecisive state of consenting to policies that will enable consumers to evaluate data services before fully committing to their data sharing policies. We address technical, regulatory, social, individual and economic perspectives for inclusion of partial consent within an access control mechanism. then, we look into the possibilities to integrate it within the access control model of Android by introducing an additional button in the interface-Maybe. this article also presents a design for such implementation and demonstrates feasibility by showcasing a prototype built on Android platform. Our effort is exploratory and aims to shed light on the probable research direction.

关键词： Partial consent access control Privacy Data protection

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A Decision Tree Learning Approach for Mining Relationship-Based access control Policies 20

A Decision Tree Learning Approach for Mining Relationship-Ba...

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

作者： Bui, thang Stoller, Scott D. SUNY Stony Brook Stony Brook NY 11794 USA

ISBN: (纸本)9781450375689

Relationship-based access control (ReBAC) provides a high level of expressiveness and flexibility that promotes security and information sharing, by allowing policies to be expressed in terms of chains of relationships between entities. ReBAC policy mining algorithms have the potential to significantly reduce the cost of migration from legacy access control systems to ReBAC, by partially automating the development of a ReBAC policy. this paper presents new algorithms, called DTRM (Decision Tree ReBAC Miner) and DTRM-, based on decision trees, for mining ReBAC policies from access control lists (ACLs) and information about entities. Compared to state-of-the-art ReBAC mining algorithms, our algorithms are significantly faster, achieve comparable policy quality, and can mine policies in a richer language.

关键词： security policy mining attribute-based access control relationship-based access control decision trees

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AQUA: An Efficient Solver for the User Authorization Query Problem 20

AQUA: An Efficient Solver for the User Authorization Query P...

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

作者： Armando, Alessandro Gazzarata, Giorgia A. Turkmen, Fatih Univ Genoa DIBRIS Genoa Italy Univ Groningen Groningen Netherlands

ISBN: (纸本)9781450375689

We present AQUA, a solver for the User Authorization Query (UAQ) problem in Role-Based access control (RBAC). the UAQ problem amounts to determining a set of roles granting a given set of permissions, satisfying a collection of authorisation constraints (most notably Dynamic Mutually-Exclusive Roles, DMER) and achieving some optimization objective, i.e. seeking min/max/any number of roles to activate and/or permissions to grant. AQUA supports the enforcement of a wide class of DMER constraints as well as several types of optimization objectives (namely, min/max/any number of roles to activate, min/max/any number of permissions to grant, and a combinations thereof). In this paper, we demonstrate the use of AQUA over a running example while providing certain implementation details including the architecture.

关键词： maxsat access control uaq sat rbac

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Matrix Decomposition: Analysis of an access control Approach on Transaction-based DAGs without Finality 20

Matrix Decomposition: Analysis of an Access Control Approach...

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

作者： Jacob, Florian Becker, Luca Grashoefer, Jan Hartenstein, Hannes Karlsruhe Inst Technol Inst Telemat Karlsruhe Germany

ISBN: (纸本)9781450375689

the Matrix message-oriented middleware(1) is gaining momentum as a basis for a decentralized, secure messaging system as shown, for example, by its deployment within the French government and by the Mozilla foundation. thus, understanding the corresponding access control approach is important. this paper provides an abstraction and an analysis of the access control approach followed by Matrix. We show that Matrix can be seen as a form of Distributed Ledger Technology (DLT) based on Transaction-based Directed Acyclic Graphs (TDAGs). TDAGs connect individual transactions to form a DAG, instead of collecting transactions in blocks as in blockchains. these TDAGs only provide causal order, eventual consistency, and no finality. However, unlike conventional DLTs, Matrix does not aim for a strict system-wide consensus. thus, there is also no guarantee for a strict consensus on access rights. By decomposition of the Matrix approach, we show that a sound decentralized access control can be implemented for TDAGs in general, and for Matrix in particular, despite those weak guarantees. In addition, we discovered security issues in popular implementations and emphasize the need for a formal verification of the employed conflict resolution mechanism.

关键词： publish-subscribe decentralized distributed ledger technology policy information matrix transaction-based directed acyclic graphs access control

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Multi-party access control-10 Years of Successes and Lessons Learned 20

Multi-party Access Control-10 Years of Successes and Lessons...

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

作者： Squicciarini, Anna Cinzia Penn State Univ Coll Informat Sci & Technol University Pk PA 16802 USA

ISBN: (纸本)9781450375689

As end-users have been asked to take on management tasks for their content and online resources, access control mechanisms have played an increasingly important role in a broad range of applications. these include data management for personalized medicine, content sharing sites, online communities, and technologies for remote collaborative work. To address the need of these emerging user-centered domains, an increasing body of work has recognized the importance of new multi-user (or more generally, stakeholder) access control mechanisms for multiple users. the emphasis on group-centered access control has led to a shift from the traditional approach taken in the access control community for two main reasons. First, the access control community had long investigated models and techniques to facilitate single subjects' access to resources according to well-defined locally-enforceable policies, with little attention given to group-driven access control decisions. Second, the underlying goal had been to maintain confidentiality rather than facilitate controlled sharing. As such, the decisions offered by these early mechanisms are single-user driven and often binary and based on inflexible policies. Consequently, researchers have investigated and proposed a variety of multiparty access control mechanisms [5], and defined rigorous models for content management among multiple users, also developing mechanisms for various applications [1-4, 6-10]. Some tools for practical applications have also been developed. However, we have also assisted to several "failures" where promising approaches have not gained traction, either among the research community or (even less) the applied world. In this talk I will first discuss unique needs and challenges with addressing access control for multi-owned content, and provide a perspective from various applications. Next, I will summarize main successes and failures of existing approaches, identify open research challenges for future resea

关键词： access control Privacy Relationship-Bases access control Multi-Party access control Conflict Resolution

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A data access model for privacy-preserving cloud-iot architectures 20

A data access model for privacy-preserving cloud-iot archite...

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25th acm symposium on access control models and technologies, SacmAT 2020

作者： Fernández, Maribel Tapia, Alex Franch Jaimunk, Jenjira Chamorro, Manuel Martinez thuraisingham, Bhavani King's College London London United Kingdom University of Texas at Dallas Dallas United States

ISBN: (纸本)9781450375689

We propose a novel data collection and data sharing model for cloud-IoT architectures with an emphasis on data privacy. this model has been implemented in Privasee, an open source platform for privacy-aware web-application development, which provides a plug-in module to support IoT application development. Privasee uses a cloud-IoT architecture called DataBank. We provide examples and discuss future extensions. © 2020 acm.

关键词： access control

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Poster: IoT SENTINEL - An ABAC Approach Against Cyber-Warfare in Organizations 20

Poster: IoT SENTINEL - An ABAC Approach Against Cyber-Warfar...

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

作者： Bhatt, Paras Bhatt, Smriti Ko, Myung Univ Texas San Antonio Dept Informat Syst & Cyber Secur San Antonio TX 78249 USA Univ Texas San Antonio Dept Comp & Cyber Secur San Antonio TX USA

ISBN: (纸本)9781450375689

Recently, Internet of things (IoT) devices and applications are becoming increasingly popular among users in various IoT domains, such as Wearable IoT, Smart Cities, Smart Home, and Smart Industry. With a range of IoT devices, cyber attack surface has hugely expanded from traditional user workstations to small autonomous devices connected to the Internet. In today's connected world, every user owns multiple connected smart devices which seamlessly connect to their organization's network. therefore, secure and fine-grained access control policies need to be implemented at the organizational level to defend against such attacks. In this paper, we propose an Attribute-Based access control (ABAC) approach to defend against cyber attacks in the context of an organization environment which are launched through compromised IoT devices owned by various legitimate users. For example, a wearable IoT device of an employee of an organization which can connect to the organization's network and compromise the whole network and lack of secure access control mechanism will enable IoT Warfare in the future. therefore, secure and fine-grained ABAC access control mechanisms and policies need to be employed for access control and authorization requirements of IoT devices.

关键词： Attributes Attribute-Based access control Cyber-Warfare IoT Warfare

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Benchmarking UAQ Solvers 20

Benchmarking UAQ Solvers

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

作者： Armando, Alessandro Gazzarata, Giorgia Turkmen, Fatih Univ Genoa DIBRIS Genoa Italy Univ Groningen Groningen Netherlands

ISBN: (纸本)9781450375689

the User Authorization Query (UAQ) Problem is key for RBAC systems that aim to offer permission level user-system interaction, where the system automatically determines the roles to activate in order to enable the requested permissions. Finding a solution to a UAQ problem amounts to determining an optimum set of roles to activate in a given session so to obtain some permissions while satisfying a collection of authorization constraints, most notably Dynamic Mutually-Exclusive Roles (DMER) constraints. Although the UAQ Problem is NP-hard, a number of techniques to solve the UAQ problem have been put forward along with encouraging, albeit inconclusive, experimental results. We propose a methodology for designing parametric benchmarks for the UAQ problem and make a novel suite of parametric benchmarks publicly available that allows for the systematic assessment of UAQ solvers over a number of relevant dimensions. By running three prominent UAQ solvers against our benchmarks, we provide a very comprehensive analysis showing (i) the shortcomings of currently available benchmarks, (ii) the adequacy of the proposed methodology and (iii) that the reduction to PMaxSAT is currently the most effective approach to tackling the UAQ problem.

关键词： Role-based access control User Authorization Query Problem Boolean Satisfiability

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