Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 429 for “"Access control"”.
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Reflective Database Access Control
Reflective Database Access Control (RDBAC) is a model in which a database privilege is expressed as a database query itself, rather than as a static privilege contained in an access control list. RDBAC aids the management of database access controls by improving the expressiveness of policies. …
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Semantic role-based access control
… we propose two semantic ontological role-based access control (RBAC) reasoning processes. These processes infer user authorisations according to a set of role permission and denial assignments, together with user role assignments. The first process, SO-RBAC (Semantic Ontological Role-Based …
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Multiple Ownership in Access Control
… stakes in these contents and they may want to control access to the contents. In this novel situation of multiple ownership a shared resource is administrated simultaneously by co-owners who may have conflicting privacy preferences and/or sharing needs. The study of access control schemes for …
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Access Control for Active Spaces
… Active Space. The performance overhead of our access control is demonstrated to be negligible. We conducted user studies for an administrative tool for our access control system to identify requirements for security administrative tools. To improve usability for the end-users of this system, we …
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DRACL (Decentralized resource access control list)
… and developer and user friendly federated access control system. It allows producers to manage, through a single authentication provider, which consumers can access what content across all content hosts that support the DRACL protocol. It preserves user privacy by not revealing the …
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Fine-grained event-based access control
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Private Information Retrieval with Access Control
… database server. However, PIR does not provide access control guarantees, allowing any user access to any record. Moreover, the database server cannot check access permissions through conventional techniques as they are fundamentally incompatible with PIR. In this thesis, we present Pirac—a …
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Media Bank--access and access control
Thesis (M.S.)--Massachusetts Institute of Technology, Program in Media Arts & Sciences, 1995.
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An Access Control Model for NoSQL Databases
… model by extending traditional role based access control for access control in NoSQL databases. The said model evaluates and executes security policies which contain versatile access conditions against the dynamic nature of data. The goal is to devise a mechanism for a forward looking, …
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Privacy-Aware Risk-Based Access Control Systems
… exclusively caused by external actors gaining access due to security gaps. Privacy breaches can also be originated by internal actors, sometimes even by trusted and authorized ones. As a consequence, most organizations prefer to strongly limit (even internally) the sharing and dissemination of …
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Secure platforms for enforcing contextual access control
… has made it possible to provide pervasive access to sensitive data to authorized individuals from any location. While this has certainly made data more accessible, it has also increased the risk of data theft as the data may be accessed from potentially unsafe locations in the presence of …
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Trust Negotiation for Open Database Access Control
… presents a model for providing and enforcing access control in an open Hippocratic database system. Previously unknown individuals can gain access to information in the database by authenticating to roles through trust negotiation. Allowing qualified strangers to access the database increases …
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Access Control for Client-Server Object Databases
… to obtain efficient, fine-grained (object-level) control over user access to ODB data. We present a target access control model for ODB applications and delineate the trust assumptions required for providing such access control in client-server environments. The prototype implementations of our …
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Medium Access Control Protocol for Satellite Constellations
… densely populated urban areas, existing Medium Access Control (MAC) protocols face significant scalability challenges and fail to take advantage of advanced antenna processing techniques, including phased array nulling, as well as capacity sharing via inter-satellite links. We present both an …
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Medium Access Control in Cognitive Radio Networks
… three coexistence-related problems at the medium access control (MAC) layer in CR networks: (1) the rendezvous (control channel) establishment problem, (2) the channel assignment problem in an ad hoc CR network, and (3) the spectrum sharing problem between infrastructure-based CR networks, i.e., …
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Dynamic Scoping for Browser Based Access Control System
… a preferred target of attacks. The current web access control system is a reason behind the victory of attacks. The current web consists of two major components, the browser and the server, where the effective access control system needs to be implemented. In terms of an access control system, …
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Model-Based Analysis of Role-Based Access Control
… been made to give security, and in particular access control, a more prominent place in MDE, but most of these approaches require advanced knowledge in security, programming (often declarative), or both, making them difficult to use by less technically trained stakeholders. In this thesis, we …
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