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检索条件"任意字段=10th ACM Symposium on Access Control Models and Technologies"

共 496 条记录，以下是321-330 订阅

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StateMiner: An Efficient Similarity-Based Approach for Optimal Mining of Role Hierarchy

StateMiner: An Efficient Similarity-Based Approach for Optim...

引用

15th acm symposium on access control models and technologies

作者： Takabi, Hassan Joshi, James B. D. Univ Pittsburgh Sch Informat Sci Pittsburgh PA 15260 USA

ISBN: (纸本)9781450300490

Recently, there is a growing trend of organizations migrating to RBAC because of the economic benefits that RBAC provides, and the ease of administration. In order to deploy an RBAC system, one requires to first identify a complete set of roles. this process, known as role engineering, has been identified as one of the costliest tasks in migrating to RBAC. Several approaches have been proposed that mostly use data mining techniques to discover roles. However, most of them do not consider the existing roles and try to define everything from scratch, which is not acceptable for organizations that already have an RBAC system in place. In this paper, we formally define the problem of mining role hierarchy with minimal perturbation and present State Miner, a heuristic solution to find an RBAC state as similar as possible to both the existing state and the optimal state. We present experiments to demonstrate the effectiveness of our approach.

关键词： access control RBAC Role Engineering Role Mining Similarity

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An Architecture for Enforcing End-to-End access control Over Web Applications

An Architecture for Enforcing End-to-End Access Control Over...

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15th acm symposium on access control models and technologies

作者： Hicks, Boniface Rueda, Sandra King, Dave Moyer, thomas Schiffman, Joshua Sreenivasan, Yogesh McDaniel, Patrick Jaeger, Trent Penn State Univ Dept Comp Sci & Engn Syst & Internet Infrastruct Secur Lab University Pk PA 16802 USA

ISBN: (纸本)9781450300490

the web is now being used as a general platform for hosting distributed applications like wikis, bulletin board messaging systems and collaborative editing environments. Data from multiple applications originating at multiple sources all intermix in a single web browser, snaking sensitive data stored in the browser subject to a broad milieu of attacks (cross-site scripting, cross-site request forgery and others). the fundamental problem is that existing web infrastructure provides no means for enforcing end-to-end security on data. To solve this we design an architecture using mandatory access control (MAC) enforcement. We overcome the limitations of traditional MAC systems, implemented solely at the operating system layer, by unifying MAC enforcement across virtual machine, operating system, networking and application layers. We implement our architecture using Xen virtual machine management, SELinux at the operating system layer, labeled IPsec for networking and our own label-enforcing web browser, called FlowwolF. We tested our implementation and find that it performs well, supporting data intermixing while still providing end-to-end security guarantees.

关键词： access control Xen Security Modules Policy Compliance

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Automated Management of Network access control from Design to Enforcement 10

Automated Management of Network Access Control from Design t...

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15th acm symposium on access control models and technologies

作者： Al-Shaer, Ehab Univ N Carolina Charlotte Sch Comp & Informat Charlotte NC USA

ISBN: (纸本)9781450300490

Recent studies show that more than 65% of the network vulnerabilities are due to misconfigured network access control. Arbor Networks in their ISP survey shows that managing access control is the top challenge in ISP networks today, which creates major reachability and security violations such as unauthorized access/traffic, backdoors and increasing attack surface [1]. access control exists in network devices such as routers, firewall and IPSec gateways and application-level such RBAC systems and authorization servers. the wide distribution of large number of access control configurations that usually exhibit different syntactic and semantic behavior in highly dynamic network environments creates real challenges for verifying, evaluating and enforcing access control policies. thus, there is a pressing need for models and tools that allow for global end-to-end analysis of access control by integrating network and application-level access control in a single framework from design, verification and optimization to evaluation and deployment. these frameworks should also provide quantitative means to design and evaluate access control automatically and objectively [2, 3]. In addition, as security risk is dynamically changing in networks due to new threats or users' behavior, enabling proactive access control will play an important role in future network defense. In this talk, I will present the state-of-the-art and discuss future challenges of designing, verification and evaluation of access control policies.

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A File-Type Sensitive, Auto-Versioning File System 10

A File-Type Sensitive, Auto-Versioning File System

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10th acm symposium on Document Engineering

作者： Mueller, Arthur Roennau, Sebastian Borghoff, Uwe M. Univ Bundeswehr Munchen Inst Software Technol D-85577 Neubiberg Germany

ISBN: (纸本)9781450302319

Auto-versioning file systems offer a simple and reliable interface to document change control. the implicit versioning of documents at each write access catches the whole evolution of a document, thus supporting regulatory compliance rules. Most existing file systems work on low abstraction levels and track the document evolution on their binary representation. Higher-level differencing tools allow for a far more meaningful change-tracking, though. In this paper, we present an auto-versioning file system that is able to handle files depending on their file type. this way, a suitable differencing tool can be assigned to each file type. Our approach supports regulatory compliant storage as well as the archiving of documents.

关键词： document management auto-versioning version control file system regulatory compliance

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EGSI: TGKA based security architecture for group communication in grid 10

EGSI: TGKA based security architecture for group communicati...

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10th IEEE/acm International symposium on Cluster, Cloud, and Grid Computing, CCGrid 2010

作者： Ingle, Rajesh Sivakumar, G. Department of Computer Science and Engineering Indian Institute of Technology Bombay Mumbai India

ISBN: (纸本)9781424469871

Security is one of the most important issues in the grid. Several processes generated by a user need to communicate securely. the existing architectures do not provide support for secure group communication in grid. Grid applications differ in various parameters such as life time, arrival rate, departure rate, staying period, and tolerance times for join and leave. these parameters are critical for optimizing performance and meeting the security requirements of the application. Existing grid security architectures do not harness knowledge of these parameters. In this paper, we propose an extended grid security infrastructure (EGSI) to support secure group communication in grid. We also present an authentication and access control scheme at virtual organization level. © 2010 IEEE.

关键词： distributed systems group communication access controls Application class awareness group key agreement

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Differential access for Publicly-Posted Composite Documents with Multiple Workflow Participants 10

Differential Access for Publicly-Posted Composite Documents ...

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10th acm symposium on Document Engineering

作者： Balinsky, Helen Y. Simske, Steven J. Hewlett Packard Labs Bristol BS34 8QZ Avon England

ISBN: (纸本)9781450302319

A novel mechanism for providing and enforcing differential access control for publicly-posted composite documents is proposed. the concept of a document is rapidly changing: individual file-based, traditional formats can no longer accommodate the required mixture of differently formatted parts: individual images, video/audio clips, Power Point presentations, html-pages, Word documents, Excel spreadsheets, pdf files, etc. Multi-part composite documents are created and managed in complex workflows, with participants including external consultants, partners and customers distributed across the globe, with many no longer contained within one monolithic secure environment. Distributed over non-secure channels, these documents carry different types of sensitive information: examples include (a) an enterprise pricing strategy for new products, (b) employees' personal records, (c) government intelligence, and (d) individual medical records. A central server solution is often hard or impossible to create and maintain for ad-hoc workflows. thus, the documents are often circulated between workflow participants over traditional, low security e-mails, placed on shared drives, or exchanged using CD/DVD or USB. the situation is more complicated when multiple workflow participants need to contribute to various parts of such a document with different access levels: for example, full editing rights, read-only, reading of some parts only, etc., for different users. We propose a full scale differential access control approach, enabling public posting of composite documents, to address these concerns.

关键词： Composite document access control document security policy

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TrustStore: Making Amazon S3 trustworthy with services composition 10

TrustStore: Making Amazon S3 trustworthy with services compo...

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10th IEEE/acm International symposium on Cluster, Cloud, and Grid Computing, CCGrid 2010

作者： Yao, Jinhui Chen, Shiping Nepal, Surya Levy, David Zic, John School of Electrical and Information Engineering University of Sydney Sydney Australia Networking Technologies Laboratory CSIRO ICT Centre Australia Sydney Australia

ISBN: (纸本)9781424469871

the enormous amount of data generated in daily operations and the increasing demands for data accessibility across organizations are pushing individuals and organizations to outsource their data storage to cloud storage services. However, the security and the privacy of the outsourced data goes beyond the data owners' control. In this paper, we propose a service composition approach to preserve privacy for data stored in untrusted storage service. A virtual file system, called TrustStore, is prototyped to demonstrate this concept. It allows users utilize untrusted storage service provider with confidentiality and integrity of the data preserved. We deployed the prototype with Amazon S3 and evaluate its performance. © 2010 IEEE.

关键词： Cloud storage

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Adaptive bandwidth allocation for per-station fairness on wireless access router

Adaptive bandwidth allocation for per-station fairness on wi...

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2010 10th International symposium on Communications and Information technologies, ISCIT 2010

作者： Visoottiviseth, Vasaka Trunganont, Akkasit Siwamogsatham, Siwaruk Faculty of Information and Communication Technology Mahidol University Thailand National Electronics and Computer Technology Center Thailand

ISBN: (纸本)9781424470105

According to the nature of IEEE 802.11 wireless LAN, the bandwidth is shared among wireless devices. However, the bandwidth could not be fairly shared among stations, because some users may use greedy applications which prevent other applications from connecting to the Internet. these applications are for example, video streaming applications, download accelerators and P2P applications. Moreover, Distributed Coordination Function (DCF) mechanism provided in the 802.11 MAC protocol originates the per-flow unfairness problem between uplink and downlink flows, as uplink flows usually dominate downlink flows and leads to unfair bandwidth allocation among wireless stations. In this paper, we propose an adaptive bandwidth allocation mechanism to provide per-station fairness. the proposed scheme can control the wireless traffic for fairness bandwidth allocation among stations. the bandwidth of each station can be adjusted to minimize the remaining bandwidth. the proposed scheme also covers a method to prevent domination of uplink flow which affects per-station fairness. Furthermore, the proposed scheme can be implemented on wireless access router. Hence, in order to support legacy wireless clients, our solution can be efficiently used. ©2010 IEEE.

关键词： Bandwidth

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SacmAT'09 - Proceedings of the 14th acm symposium on access control models and technologies

SACMAT'09 - Proceedings of the 14th ACM Symposium on Access ...

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14th acm symposium on access control models and technologies, SacmAT 2009

ISBN: (纸本)9781605585376

the proceedings contain 24 papers. the topics discussed include: safety in discretionary access control for logic-based publish-subscribe systems;ensuring spatio-temporal access control for real-world applications;an efficient framework for user authorization queries in RBAC systems;towards formal security analysis of GTRBAC using timed automata;xDomain: cross-border proofs of access;dynamic mandatory access control for multiple stakeholders;an algebra for fine-grained integration of XacmL policies;usability meets access control: challenges and research opportunities;automating role-based provisioning by learning from examples;a formal framework to elicit roles with business meaning in RBAC systems;evaluating role mining algorithms;a decision support system for secure information sharing;foundations for group-centric secure information sharing models;patient-centric authorization framework for sharing electronic health records;and access control policy combining: theory meets practice.

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A Web-Based Collaborative Metamodeling Environment with Secure Remote Model access

A Web-Based Collaborative Metamodeling Environment with Secu...

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10th International Conference on Web Engineering

作者： Farwick, Matthias Agreiter, Berthold White, Jules Forster, Simon Lanzanasto, Norbert Breu, Ruth Univ Innsbruck Inst Comp Sci A-6020 Innsbruck Austria Vanderbilt Univ Elect Engn & Comp Sci Nashville TN USA

ISBN: (纸本)9783642139109

this contribution presents GEMSjax - a web-based metamodeling tool for the collaborative development of domain specific languages. By making use of modern Web 2.0 technologies like Ajax and REST services, the tool allows for simultaneous web browser-based creation/editing of metamodels and model instances, as well as secure remote model access via REST, which enables remote model modification over a simple HTTP-based interface. this paper describes the complex technical challenges we faced and solutions we produced to provide browser-based synchronous model editing. It further explains on the XacmL-based access control mechanisms to provide secure remote access to models and model elements. Additionally, we highlight the usefulness of our approach by describing its application in a realistic usage scenario.

关键词： HTTP

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