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检索条件"任意字段=20th ACM Symposium on Access Control Models and Technologies, SACMAT 2015"

共 39 条记录，以下是1-10 订阅

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Proceedings of acm symposium on access control models and technologies, sacmat

Proceedings of ACM Symposium on Access Control Models and Te...

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20th acm symposium on access control models and technologies, sacmat 2015

ISBN: (纸本)9781450335560

the proceedings contain 24 papers. the topics discussed include: Mohawk+T: efficient analysis of administrative temporal role-based access control (ATRBAC) policies;automated inference of access control policies for web applications;SecLoc: securing location-sensitive storage in the cloud;a logical approach to restricting access in online social networks;preventing information inference in access control;on missing attributes in access control: non-deterministic and probabilistic attribute retrieval;relationship-based access control for an open-source medical records system;federated access management for collaborative network environments: framework and case study;a prototype to reduce the amount of accessible information;a SMT-based tool for the analysis and enforcement of NATO content-based protection and release policies;towards an automatic top-down role engineering approach using natural language processing techniques;and generating secure images for CAPTCHAs through noise addition.

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sacmat'08 - Proceedings of the 13th acm symposium on access control models and technologies

SACMAT'08 - Proceedings of the 13th ACM Symposium on Access ...

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

ISBN: (纸本)9781605581293

the proceedings contain 20 papers. the topics discussed include: fast exact and heuristic methods for role minimization problems;migrating to optimal RBAC with minimal perturbation;mining roles with semantic meanings;delegation and satisfiability in workflow systems;enforcing security properties in task-based systems;task-based entailment constraints for basic workflow patterns;role on role engineering;RBAC administration in distributed systems;policy decomposition for collaborative access control;context-aware role-based access control in pervasive computing systems;a general obligation model and continuity-enhanced policy enforcement engine for usage control;an obligation model bridging access control policies and privacy policies;measuring integrity on mobile phone systems;and detecting and resolving policy misconfigurations in access-control systems.

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sacmat 2024 - Proceedings of the 29th acm symposium on access control models and technologies

SACMAT 2024 - Proceedings of the 29th ACM Symposium on Acces...

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29th acm symposium on access control models and technologies, sacmat 2024

ISBN: (纸本)9798400704918

the proceedings contain 20 papers. the topics discussed include: ToneCheck: unveiling the impact of dialects in privacy policy;make split, not hijack: preventing feature-space hijacking attacks in split learning;making privacy-preserving federated graph analytics practical (for certain queries);SecureCheck: user-centric and geolocation-aware access mediation contracts for sharing private data;static and dynamic analysis of a usage control system;SPRT: automatically adjusting SELinux policy for vulnerability mitigation;utilizing threat partitioning for more practical network anomaly detection;prompting LLM to enforce and validate CIS critical security control;pairing human and artificial intelligence: enforcing access control policies with LLMs and formal specifications;and BlueSky: how to raise a robot — a case for neuro-symbolic ai in constrained task planning for humanoid assistive robots.

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Privacy and access control;How are these twoconcepts related? 15

Privacy and access control;How are these twoconcepts related...

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Squicciarini, Anna Yu, Ting College of Information Sciences and Technology Pennsylvania State University United States Qatar Computing Research Institute Doha Qatar

No abstract available.

ISBN: (纸本)9781450335560

No abstract available.

关键词： security access control privacy

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Hard instances for verification problems in access control 15

Hard instances for verification problems in access control

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Mousavi, Nima Tripunitara, Mahesh Google Inc. Waterloo Canada ECE University of Waterloo Waterloo Canada

ISBN: (纸本)9781450335560

We address the generation and analysis of hard instances for verification problems in access control that are NP-hard. Given the customary assumption that P = NP, we know that such classes exist. We focus on a particular problem, the user-authorization query problem (UAQ) in Role-Based access control (RBAC). We show how to systematically generate hard instances for it. We then analyze what we call the structure of those hard instances. Our work brings the important aspect of systematic investigation of hard input classes to access control research.

关键词： Authorization

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A logical approach to restricting access in online social networks 15

A logical approach to restricting access in online social ne...

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Cramer, Marcos Pang, Jun Zhang, Yang University of Luxembourg Luxembourg

ISBN: (纸本)9781450335560

Nowadays in popular online social networks users can blacklist some of their friends in order to disallow them to access resources that other non-blacklisted friends may access. We identify three independent binary decisions to utilize users' blacklists in access control policies, resulting into eight access restrictions. We formally define these restrictions in a hybrid logic for relationship-based access control, and provide syntactical transformations to rewrite a hybrid logic access control formula when fixing an access restriction. this enables a flexible and user-friendly approach for restricting access in social networks. We develop efficient algorithms for enforcing a subset of access control policies with restrictions. the effectiveness of the access restrictions and the efficiency of our algorithms are evaluated on a Facebook dataset.

关键词： Social networking (online)

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Commune: Shared ownership in an agnostic cloud 15

Commune: Shared ownership in an agnostic cloud

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Soriente, Claudio Karame, Ghassan O. Ritzdorf, Hubert Marinovic, Srdjan Capkun, Srdjan ETH Zurich Switzerland NEC Laboratories Germany Wireless Registry Inc. United States

ISBN: (纸本)9781450335560

Cloud storage platforms promise a convenient way for users to share files and engage in collaborations, yet they require all files to have a single owner who unilaterally makes access control decisions. Existing clouds are, thus, agnostic to shared ownership. this can be a significant limitation in many collaborations because, for example, one owner can delete files and revoke access without consulting the other collaborators. In this paper, we first formally define a notion of shared ownership within a file access control model. We then propose a solution, called Commune, to the problem of distributed enforcement of shared ownership in agnostic clouds, so that access grants require the support of an agreed threshold of owners. Commune can be used in existing clouds without modifications to the platforms. We analyze the security of our solution and evaluate its performance through an implementation integrated with Amazon S3. © Copyright 2015 acm.

关键词： access control models

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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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Preventing information inference in access control 15

Preventing information inference in access control

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20th acm symposium on access control models and technologies, sacmat 2015

作者： Paci, Federica Zannone, Nicola University of Southampton United Kingdom Eindhoven University of Technology Netherlands

ISBN: (纸本)9781450335560

Technological innovations like social networks, personal devices and cloud computing, allow users to share and store online a huge amount of personal data. Sharing personal data online raises significant privacy concerns for users, who feel that they do not have full control over their data. A solution often proposed to alleviate users' privacy concerns is to let them specify access control policies that reflect their privacy constraints. However, existing approaches to access control often produce policies which either are too restrictive or allow the leakage of sensitive information. In this paper, we present a novel access control model that reduces the risk of information leakage. the model relies on a data model which encodes the domain knowledge along with the semantic relations between data. We illustrate how the access control model and the reasoning over the data model can be automatically translated in XacmL. We evaluate and compare our model with existing access control models with respect to its effectiveness in preventing leakage of sensitive information and efficiency in authoring policies. the evaluation shows that the proposed model allows the definition of effective access control policies that mitigate the risks of inference of sensitive data while reducing users' effort in policy authoring compared to existing models. © Copyright 2015 acm.

关键词： Semantics

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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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