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检索条件"任意字段=Proceedings of the 23nd ACM on Symposium on Access Control Models and Technologies"

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access control in the Era of Big Data: State of the Art and Research Directions 18

Access Control in the Era of Big Data: State of the Art and ...

引用

23rd acm symposium on access control models and technologies (SacmAT)

作者： Colombo, Pietro Ferrari, Elena Univ Insubria DiSTA Varese Italy

ISBN: (纸本)9781450356664

Data security and privacy issues are magnified by the volume, the variety, and the velocity of Big Data and by the lack, up to now, of a standard data model and related data manipulation language. In this paper, we focus on one of the key data security services, that is, access control, by highlighting the differences with traditional data management systems and describing a set of requirements that any access control solution for Big Data platforms may fulfill. We then describe the state of the art and discuss open research issues.

关键词： Big Data access control Privacy NoSQL Data Management Systems

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access control Enforcement within MQTT-based Internet of Things Ecosystems 18

Access Control Enforcement within MQTT-based Internet of Thi...

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Colombo, Pietro Ferrari, Elena Univ Insubria DiSTA Varese Italy

ISBN: (纸本)9781450356664

Confidentiality and privacy of data managed by IoT ecosystems is becoming a primary concern. This paper targets the design of a general access control enforcement mechanism for MQTT-based IoT ecosystems. The proposed approach is presented with ABAC, but other access control models can be similarly supported. The solution is based on an enforcement monitor that has been designed to operate as a proxy between MQTT clients and an MQTT server. The monitor enforces access control constraints by intercepting and possibly manipulating the flow of exchanged MQTT control packets. Early experimental evaluations have overall shown low enforcement overhead.

关键词： access control Internet of Things MQTT

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Poster: Reactive access control Systems 23

Poster: Reactive Access Control Systems

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Davari, Maryam Bertino, Elisa Purdue Univ W Lafayette IN 47907 USA

ISBN: (纸本)9781450356664

In context-aware applications, user's access privileges rely on both user's identity and context. access control rules are usually statically defined while contexts and the system state can change dynamically. Changes in contexts can result in service disruptions. To address this issue, this poster proposes a reactive access control system that associates contingency plans with access control rules. Risk scores are also associated with actions part of the contingency plans. Such risks are estimated by using fuzzy inference. Our approach is cast into the XacmL reference architecture.

关键词： Context-aware applications reactive access control system contingency plan risk Fuzzy inference XacmL

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Mining Positive and Negative Attribute-Based access control Policy Rules 18

Mining Positive and Negative Attribute-Based Access Control ...

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23rd acm symposium on access control models and technologies (SacmAT)

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

ISBN: (纸本)9781450356664

Mining access control policies can reduce the burden of adopting more modern access control models by automating the process of generating policies based on existing authorization information in a system. Previous work in this area has focused on mining positive authorizations only. That includes the literature on mining role-based access control policies (which are naturally about positive authorization) and even more recent work on mining attribute-based access control (ABAC) policies. However, various theoretical access control models (including ABAC), specification standards (such as XacmL), and implementations (such as operating systems and databases) support negative authorization as well as positive authorization. In this paper, we propose a novel approach to mine ABAC policies that may contain both positive and negative authorization rules. We evaluate our approach using two different policies in terms of correctness, quality of rules (conciseness), and time. We show that while achieving the new goal of supporting negative authorizations, our proposed algorithm outperforms existing approach to ABAC mining in terms of time.

关键词： attribute-based access control policy mining negative authorization authorization conflicts

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Poster: Using Gini Impurity to Mine Attribute-based access control Policies with Environment Attributes 23

Poster: Using Gini Impurity to Mine Attribute-based Access C...

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Das, Saptarshi Sural, Shamik Vaidya, Jaideep Atluri, Vijayalakshmi IIT Kharagpur Kharagpur W Bengal India Rutgers State Univ New Brunswick NJ USA

ISBN: (纸本)9781450356664

In Attribute-based access control (ABAC) systems, utilizing environment attributes along with the subject and object attributes introduces a dynamic nature to the access decisions. The inclusion of environment attributes helps in achieving a more fine-grained access control. In this paper, we present an ABAC policy mining algorithm that considers the environment attributes and their associated values while forming the rules. Furthermore, we use gini impurity to form the rules. This helps to minimize the number of rules in the generated policy. The experimental evaluation shows that our approach is quite effective in practice.

关键词： ABAC Policy mining Environment attributes Gini impurity

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Self-Generation of access control Policies 18

Self-Generation of Access Control Policies

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Calo, Seraphin Verma, Dinesh Chakraborty, Supriyo Bertino, Elisa Lupu, Emil Cirincione, Gregory IBM Res Yorktown Hts NY 10598 USA Purdue Univ W Lafayette IN 47907 USA Imperial Coll London England Army Res Labs Adelphi MD USA

ISBN: (纸本)9781450356664

access control for information has primarily focused on access statically granted to subjects by administrators usually in the context of a specific system. Even if mechanisms are available for access revocation, revocations must still be executed manually by an administrator. However, as physical devices become increasingly embedded and interconnected, access control needs to become an integral part of the resources being protected and be generated dynamically by the resources depending on the context in which they are being used. In this paper, we discuss a set of scenarios for access control needed in current and future systems and use that to argue that an approach for resources to generate and manage their access control policies dynamically on their own is needed. We discuss some approaches for generating such access control policies that may address the requirements of the scenarios.

关键词： Dynamic Security IoT Machine Learning AI Autonomic access control

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Multi-Party access control: Requirements, State of the Art and Open Challenges 18

Multi-Party Access Control: Requirements, State of the Art a...

引用

23rd acm symposium on access control models and technologies (SacmAT)

作者： Squicciarini, Anna Cinzia Rajtmajer, Sarah Michele Zannone, Nicola Penn State Univ University Pk PA 16802 USA Quantitat Sci Solut Arlington VA USA Eindhoven Univ Technol Eindhoven Netherlands

ISBN: (纸本)9781450356664

Multi-party access control is gaining attention and prominence within the community, as access control models and systems are faced with complex, jointly-owned and jointly-managed content. Traditional single-user approaches lack the richness and flexibility to accommodate these scenarios, resulting in undesired disclosure of sensitive data and resources. Moving forward fundamental work in this area is critical. In particular, as personal data amasses and algorithms for data mining improve, personally identifiable information is more readily inferred and the practical implications of privacy decisions are relatively opaque. This is true even at the individual level, but the parallel problem for jointly managed content involves the cross product of these complex outcomes. In this presentation, we discuss fundamental requirements of successful multi-party access control mechanisms and contextualize these concepts with respect to the state of the art. Based on this analysis, we identify open challenges and draw a roadmap for future work.

关键词： Collaborative access control data governance literature study

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HCAP: A History-Based Capability System for IoT Devices 18

HCAP: A History-Based Capability System for IoT Devices

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Tandon, Lakshya Fong, Philip W. L. Safavi-Naini, Reihaneh Univ Calgary Calgary AB Canada

ISBN: (纸本)9781450356664

Permissions are highly sensitive in Internet-of-Things (IoT) applications, as IoT devices collect our personal data and control the safety of our environment. Rather than simply granting permissions, further constraints shall be imposed on permission usage so as to realize the Principle of Least Privilege. Since IoT devices are physically embedded, they are often accessed in a particular sequence based on their relative physical positions. Monitoring if such sequencing constraints are honoured when IoT devices are accessed provides a means to fence off malicious accesses. This paper proposes a history-based capability system, HCAP, for enforcing permission sequencing constraints in a distributed authorization environment. We formally establish the security guarantees of HCAP, and empirically evaluate its performance.

关键词： Internet of Things distributed authorization History-Based access control capability system formal verification safety liveness performance evaluation

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Privacy-Aware Risk-Adaptive access control in Health Information Systems using Topic models 18

Privacy-Aware Risk-Adaptive Access Control in Health Informa...

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Zhang, Wenxi Li, Hao Zhang, Min Lv, Zhiquan Chinese Acad Sci Inst Software Beijing Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Coordinat Ctr China Natl Comp Network Emergency Response Tech Team Beijing Peoples R China

ISBN: (纸本)9781450356664

Traditional role-based access control fails to meet the privacy requirements for patient data in medical systems, as it is infeasible for policy makers to foresee what information doctors may need for diagnosis and treatment in various situations. The universal practice in hospitals is to grant doctors unlimited access, which in turn increases the risk of breaching patient privacy. In this paper, we propose a dynamic risk-adaptive access control model for health IT systems by taking into consideration the relationships between data and access behaviors. By training topic models to portray individual and group-level access behaviors, we quantify the risk for each user over a certain period of time. Malicious users are supposed to get higher risk scores than honest users due to improper requests. Thus their further access would be denied under our access control scheme. The topic model and risk scores are periodically updated to advance the self-adaptability of the system. Experimental results have shown that our solution could effectively distinguish malicious doctors even if they deliberately conceal the misconducts.

关键词： access control Privacy Risk Quantification Topic Model Health-care

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A blockchain-based Trust System for the Internet of Things 18

A blockchain-based Trust System for the Internet of Things

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23rd acm symposium on access control models and technologies (SacmAT)

作者： Di Pietro, Roberto Salleras, Xavier Signorini, Matteo Waisbard, Erez HBKU CSE Doha Qatar UPF Barcelona Spain Nokia Bell Labs Murray Hill NJ USA

ISBN: (纸本)9781450356664

One of the biggest challenges for the Internet of Things (IoT) is to bridge the currently fragmented trust domains. The traditional PKI model relies on a common root of trust and does not fit well with the heterogeneous IoT ecosystem where constrained devices belong to independent administrative domains. In this work we describe a distributed trust model for the IoT that leverages the existing trust domains and bridges them to create end-to-end trust between IoT devices without relying on any common root of trust. Furthermore we define a new cryptographic primitive, denoted as obligation chain designed as a credit-based Blockchain with a built-in reputation mechanism. Its innovative design enables a wide range of use cases and business models that are simply not possible with current Blockchain-based solutions while not experiencing traditional blockchain delays. We provide a security analysis for both the obligation chain and the overall architecture and provide experimental tests that show its viability and quality.

关键词： IoT Blockchain Distributed Ledger access control Security

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