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Securing Content in Decentralized Online Social Networks:Solutions, Limitations, and the Road Ahead 22

Securing Content in Decentralized Online Social Networks&#58...

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Proceedings of the 27th acm on symposium on access control models and technologies

作者： Roberto Di Pietro Hamad Bin Khalifa University Doha Qatar

ISBN: (纸本)9781450393577

the most popular On-line Social Networks (OSNs) are based on centralized architectures where service providers (e.g., Facebook, Twitter, or Instagram) have full control over the data published by their user---a requirement of their business model, based on the monetization of the cited data [2]. In addition, such centralized architectures also increase the risk of censorship, surveillance, and information leakage [3]. Distributed On-line Social Networks (DOSNs), instead, are typically based on a P2P architecture, where there is no central service provider in control of user data. Indeed, the contents that are published on DOSNs are stored on user-provided devices, that also cooperate to execute the tasks needed to realize the intended service. Most of the popular DOSNs, in an effort to help users smoothly regulate content sharing in adherence to their privacy preferences, allow to organize users in groups. In this way, each user can choose to share content with the users belonging to specific groups only. the lack of a (logically) centralized, third party managed, reliable infrastructure to guarantee content availability---whether a given user is on-line or not---has led to have the contents published by a user to be stored on the devices of other users as well. Indeed, such a choice increases the chances that at least one of the cooperating users device (and the contents stored therein) is online when the content is required. Given the two above introduced (conflicting) requirements: group-oriented privacy setting and distributed storage, a critical feature of DOSNs is that published contents must be properly protected by the DOSN infrastructure, in order to ensure that they can be accessed only by users that have the appropriate permissions---granted by the publishers. Hence, DOSNs require efficient solutions for protecting the privacy of the contents published by each user with respect to the other users of the social network. While some preliminary solutions hav

关键词： models decentralized on-line social networks access control confidentiality availability

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Visual Language for Device Management in Telecommunication Product Line 10th

Visual Language for Device Management in Telecommunication P...

引用

10th International Conference on New Trends in Model and Data Engineering, MEDI 2021 held with 4th International Workshop on Modeling, Verification and Testing of Dependable Critical Systems, DETECT 2021, symposium on Intelligent and Autonomous Systems, SIAS 2021, 1st Workshop on control Software: Methods, models, and Languages, CSMML 2021, Workshop on Blockchain for Inter-Organizational Collaboration, BIOC 2021 and 1st International Health Data Workshop, HEDA 2021

作者： Semenov, Eugeny Kai, Sheng Gen, Chen Luciv, Dmitry Koznov, Dmitry Huawei Technologies Co. Ltd. Shenzhen China Saint-Petersburg State University Saint Petersburg Russia Alferov University RAS Saint Petersburg Russia

ISBN: (纸本)9783030876562

In the present paper, we consider the task of creating hardware specifications for telecommunication devices that close the communication gap between hardware engineers and software developers. this task has arisen during the development of a family of telecommunication systems at Huawei. the specifications need to describe hardware from the viewpoint of driver development (i.e., device management), omitting many hardware details and including information for automatic generation of driver data structures and signatures. Furthermore, they need to be comprehensive and illustrative for both engineering groups. To meet this challenge, we propose a visual language supporting five views (representations): Structured view (all structural elements of a device), Composite view (all connections of a device), Datapath view (device parts that process the data flow), control view (device parts that control the data flow processing), and Service view (device parts that provide additional functionality). We present an implementation of the visual language built with the Eclipse Modeling Tools Xtext/EMF/Sirius and integrated into a development environment for device management. We have received positive feedback from the device management software engineers. © 2021, Springer Nature Switzerland AG.

关键词： Modeling languages

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Poster: Unified access control for Surgical Robotics 19

Poster: Unified Access Control for Surgical Robotics

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

作者： Shah, Ryan Nagaraja, Shishir Univ Strathclyde Glasgow Lanark Scotland

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Blockchain-based access control Mechanism of Federated Data Sharing System 18

Blockchain-based Access Control Mechanism of Federated Data ...

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18th IEEE Int Symp on Parallel and Distributed Proc with Applicat (ISPA) / 10th IEEE Int Conf on Big Data and Cloud Comp (BDCloud) / IEEE Int Symp on Social Comp and Networking (SocialCom) / IEEE Int Conf on Sustainable Comp and Commun (SustainCom)

作者： Ding, Yan Feng, Liaoliao Qin, Ying Dong, Pan Huang, Chenlin Gao, Long Tan, Yusong Natl Univ Def Technol Sch Comp Changsha Peoples R China

ISBN: (纸本)9781665414852

Sharing data assets has emerged among organizations with variable interest, especially in the manner of federation. Blockchain has been used in data sharing systems to provide the audit and access control on data because of its tamper-proof characteristics. However, the user's authority is difficult to accurately describe because of the complexity of users' multidimensional roles in the federation. And when developing the decentralized access control mechanism with the support of blockchain techniques, how to improve the efficiency of the decision for access control is the problem that is necessary to be solved. In this paper, we propose a blockchain-based multidimensional user authorization and role-based access control mechanism in the federated data sharing system. the colored coin is defined to identify the user's authority in multi-dimension, and decentralized access control decision is achieved through the automatic execution of smart contracts, thereby effectively enhancing the mechanism robustness and improving the security decision performance. the system is implemented on the basis of HyperLedger Fabric. Experimental results show that the proposed scheme is feasible and efficient. the decision efficiency is remained stable with the increasing of policy rules.

关键词： data sharing blockchain access control smart contract Hyperledger Fabric

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An Overview of Smart Wheelchair technologies 10th

An Overview of Smart Wheelchair Technologies

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10th International Conference on Health Informatics and Medical Systems, HIMS 2024 and 10th International Conference on Biomedical Engineering, BIOENG 2024, held as part of the World Congress in Computer Science, Computer Engineering and Applied Computing, CSCE 2024

作者： Kovacevic, Nikol Ahmad, Ishfaq Clark, Addison Saifullah, Khalid University of Texas at Arlington ArlingtonTX76017 United States

ISBN: (纸本)9783031859076

Many individuals who are in need of mobility assistance do not have access to the proper wheelchair for their type of mobility disability. there is growing research towards creating smart wheelchairs using a variety of methods, such as biopotential signals or eye tracking for input and LiDAR, ultrasonic sensors, or using a camera to create a map or track position. there have been other methods, such as voice control, sip and puff, and hand gestures, but there are disadvantages of these that can limit their usefulness. Smart wheelchairs should account for collisions, but also emphasize the safety and comfort of the user. In this paper, we review and classify state-of-the-art research in smart wheelchairs. Many machine learning models are used for various parts of wheelchairs, from mapping and signal processing to input classification. Smart wheelchairs rely on various hardware devices, such as eye trackers, electrode caps, EMG armbands, RPLidar, RGB-cameras, and ultrasonic sensors. Some hybrid models use a combination of methods to account for some of their limitations. Some research has leaned towards training games to help teach users. Future work should include improvement of classification methods for various input signals and improvement on the accessibility of the technology. © the Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： assistive technologies autonomous navigation EEG object detection Smart wheelchair

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Mutual Authorizations: Semantics and Integration Issues 19

Mutual Authorizations: Semantics and Integration Issues

引用

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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Generalized Mining of Relationship-Based access control Policies in Evolving Systems 19

Generalized Mining of Relationship-Based Access Control Poli...

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

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

ISBN: (纸本)9781450367530

Relationship-based access control (ReBAC) provides a flexible approach to specify policies based on relationships between system entities, which makes them a natural fit for many modern information systems, beyond online social networks. In this paper we are concerned with the problem of mining ReBAC policies from lower-level authorization information. Mining ReBAC policies can address transforming access control paradigms to ReBAC, reformulating existing ReBAC policies as more information becomes available, as well as inferring potentially unknown policies. Particularly, we propose a systematic algorithm for mining ReBAC authorization policies, and a first of its kind approach to mine graph transition policies that govern the evolution of ReBAC systems. Experimental evaluation manifests efficiency of the proposed approaches.

关键词： relationship-based access control policy mining graph transition

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An OpenRBAC Semantic Model for access control in Vehicular Networks 19

An OpenRBAC Semantic Model for Access Control in Vehicular N...

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

作者： Alsarra, Sultan Yen, I-Ling Huang, Yongtao Bastani, Farokh thuraisingham, Bhavani Univ Texas Dallas Richardson TX 75083 USA

ISBN: (纸本)9781450367530

Inter-vehicle communication has the potential to significantly improve driving safety, but also raises security concerns. the fundamental mechanism to govern information sharing behaviors is access control. Since vehicular networks have a highly dynamic and open nature, access control becomes very challenging. Existing works are not applicable to the vehicular world. In this paper, we develop a new access control model, openRBAC, and the corresponding mechanisms for access control in vehicular systems. Our approach lets the accessee define a relative role hierarchy, specifying all potential accessor roles in terms of their relative perception to the accessees. access control policies are defined for the relative roles in the hierarchy. Since the accessee has a clear understanding of the relative roles defined by itself, the policy definitions can be precise and less flawed.

关键词： access control role-based access control attribute-based access control vehicular systems vehicular network

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CMCAP: Ephemeral Sandboxes for Adaptive access control 19

CMCAP: Ephemeral Sandboxes for Adaptive Access Control

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

作者： Bucuti, theogene Hakiza Dantu, Ram Morozov, Kirill Univ North Texas Dept Comp Sci & Engn Denton TX 76203 USA

ISBN: (纸本)9781450367530

We present CMCAP (context-mapped capabilities), a decentralized mechanism for specifying and enforcing adaptive access control policies for resource-centric security. Policies in CMCAP express runtime constraints defined as containment domains with context-mapped capabilities, and ephemeral sandboxes for dynamically enforcing desired information flow properties while preserving functional correctness for the sandboxed programs. CMCAP is designed to remediate DAC's weakness and address the inflexibility that makes current MAC frameworks impractical to the common user. We use a Linux-based implementation of CMCAP to demonstrate how a program's dynamic profile is used for access control and intrusion prevention.

关键词： adaptive access control runtime containment intrusion prevention ephemeral sandboxes information flow control

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Edge-to-Fog Collaborative Computing in a Swarm of Drones 10th

Edge-to-Fog Collaborative Computing in a Swarm of Drones

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作者： Rahbari, Dadmehr Mahtab Alam, Muhammad Le Moullec, Yannick Jenihhin, Maksim Thomas Johann Seebeck Department of Electronics Tallinn University of Technology Ehitajate tee 5 Tallinn19086 Estonia Department of Computer Systems Tallinn University of Technologies Akadeemia tee 15A Tallinn12618 Estonia

ISBN: (纸本)9783030876562

Recently, drones technology started unleashing numerous novel applications and services and became one of the killer applications for the Mobile Edge Computing (MEC) paradigm. the main challenge for real-time applications is, however, transferring data between data processing servers and drones, which yields considerable latency and energy consumption and reduces the autonomy and dynamics of operations. In this paper, we consider a swarm of heterogeneous and autonomous drones deployed to detect objects in run-time video streaming. Each drone can execute data-processing related computation tasks locally, or offload them to other nodes in the swarm. For efficient cooperation at the swarm level, forming a system of systems, drones need to cooperate in using each other’s resources and managing the communication and offloading operations. To overcome the mentioned challenges and also data privacy, we propose a novel edge-to-fog collaborative computing framework employing federated learning (FL)-based offloading strategy with a rating method. the proposed method also aims to offload the computation tasks between drones in a fair and efficient manner. © 2021, Springer Nature Switzerland AG.

关键词： Drones

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