A model for providing solutions to the security issue of the cloud computing environment is addressed in this article by proposing a distributed collaborative trust service recommender (DTSR) system. DTSRs are kept in...
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A model for providing solutions to the security issue of the cloud computing environment is addressed in this article by proposing a distributed collaborative trust service recommender (DTSR) system. DTSRs are kept in a distributed manner spread over the clouds, and they are used to extract raw trust from different sources. This trust information is based on the feedback by cloud service user's observation about the adherence of a cloud service provider (CSP) to a service level agreement for the cloud-based service provided. Using this trust data, the overall trust of CSPs is computed by using collaborative computation. The trust values are propagated among the distributed DTSRs in the network so that the trust values are available to everyone in the cloud environment. Experiments were conducted, which clearly shows that our proposed system is useful in providing a secure multicloud environment.
Cloud computing is both a technological and a business model revolution that capitalised on many long proven technologies. Its ease of use resulted in its wide adoption, and users are increasingly faced with a large c...
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An important use of computational systems is updating the state of an object while preserving some set of invariants. That object might be a file, a row in a database, or perhaps an entry in a distributed system. Its ...
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Many applications that benefit from data offload to cloud services operate on private data. A now-long line of work has shown that, even when data is offloaded in an encrypted form, an adversary can learn sensitive in...
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Cloud computing offers significant impacts on organization by changing how information systems are developed, deployed, operated, maintained, and paid for. Therefore, the adoption of cloud computing becomes the focus ...
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Cloud computing offers significant impacts on organization by changing how information systems are developed, deployed, operated, maintained, and paid for. Therefore, the adoption of cloud computing becomes the focus of relevant research;however, previous studies have mostly studied the factors affecting cloud computing adoption from the perspective of adopters, ignoring the influence of the vendors. This study defines cloud service capability and develops scale to measure it from the perspective of cloud computing vendors to empirically examine the impact of the supply-side of cloud computing. The initial scale of cloud service capability is constructed using qualitative research, and the formal scale is obtained after two rounds of pretest. The statistical results of matched data collected from 132 cloud computing vendors and their users show that cloud service capability significantly affects cloud computing adoption. This study shifts the research perspective on cloud adoption to make theoretical contributions and management insights from the perspective of cloud computing vendors.
The object of research are agent-based metacomputer systems for data and knowledge processing in distributed database systems. A metacomputer is a virtual system with a predetermined architecture deployed on a global ...
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Data security remains a major concern for organizations considering the use of cloud services to store their confidential, business-critical data. In this paper, we investigate how information flow control can be used...
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The Domain Name System (DNS) is a hierarchical, decentralized, and distributeddatabase. A key mechanism that enables the DNS to be hierarchical and distributed is delegation [7] of responsibility from parent to child...
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ISBN:
(纸本)9783030440817;9783030440800
The Domain Name System (DNS) is a hierarchical, decentralized, and distributeddatabase. A key mechanism that enables the DNS to be hierarchical and distributed is delegation [7] of responsibility from parent to child zones-typically managed by different entities. RFC1034 [12] states that authoritative nameserver (NS) records at both parent and child should be "consistent and remain so", but we find inconsistencies for over 13M second-level domains. We classify the type of inconsistencies we observe, and the behavior of resolvers in the face of such inconsistencies, using RIPE Atlas to probe our experimental domain configured for different scenarios. Our results underline the risk such inconsistencies pose to the availability of misconfigured domains.
The input of a linear algebra (LA) operation, such as matrices and vectors, could be stored in multiple ways: rows/columns, strips, blocks, etc. Usually, it is very difficult for a programmer to figure out the proper ...
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The input of a linear algebra (LA) operation, such as matrices and vectors, could be stored in multiple ways: rows/columns, strips, blocks, etc. Usually, it is very difficult for a programmer to figure out the proper format to use to make a LA computation run fast. Predicting and optimizing the runtime behavior of a LA computation is not an easy task, even when one has expert knowledge of the underlying execution engine. The situation is particularly difficult if the computation consists of thousands of operations, and those operations must be run in a distributed manner. In this paper, we argue that we can render a parallel relational database to automatically explore the formats of LA computations. More specifically, our system would take in the existing code and analyze the operations in the code, explore different formats for those operations and select the most efficient formats, and finally automatically generate the new code to run those operations in their selected formats. We show that our implementation is able to find the formats that have a better performance than the formats that are manually picked up by an expert user of the system.
In this work, we propose an optimized data assignment algorithm for time dependent non-replicated distributed database systems based on a modified Dijkstra shortest path algorithm findings. Fragment assignment is dete...
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