1,095 research outputs found
A Taxonomy of Data Grids for Distributed Data Sharing, Management and Processing
Data Grids have been adopted as the platform for scientific communities that
need to share, access, transport, process and manage large data collections
distributed worldwide. They combine high-end computing technologies with
high-performance networking and wide-area storage management techniques. In
this paper, we discuss the key concepts behind Data Grids and compare them with
other data sharing and distribution paradigms such as content delivery
networks, peer-to-peer networks and distributed databases. We then provide
comprehensive taxonomies that cover various aspects of architecture, data
transportation, data replication and resource allocation and scheduling.
Finally, we map the proposed taxonomy to various Data Grid systems not only to
validate the taxonomy but also to identify areas for future exploration.
Through this taxonomy, we aim to categorise existing systems to better
understand their goals and their methodology. This would help evaluate their
applicability for solving similar problems. This taxonomy also provides a "gap
analysis" of this area through which researchers can potentially identify new
issues for investigation. Finally, we hope that the proposed taxonomy and
mapping also helps to provide an easy way for new practitioners to understand
this complex area of research.Comment: 46 pages, 16 figures, Technical Repor
Access Control Mechanisms in Named Data Networks:A Comprehensive Survey
Information-Centric Networking (ICN) has recently emerged as a prominent
candidate for the Future Internet Architecture (FIA) that addresses existing
issues with the host-centric communication model of the current TCP/IP-based
Internet. Named Data Networking (NDN) is one of the most recent and active ICN
architectures that provides a clean slate approach for Internet communication.
NDN provides intrinsic content security where security is directly provided to
the content instead of communication channel. Among other security aspects,
Access Control (AC) rules specify the privileges for the entities that can
access the content. In TCP/IP-based AC systems, due to the client-server
communication model, the servers control which client can access a particular
content. In contrast, ICN-based networks use content names to drive
communication and decouple the content from its original location. This
phenomenon leads to the loss of control over the content causing different
challenges for the realization of efficient AC mechanisms. To date,
considerable efforts have been made to develop various AC mechanisms in NDN. In
this paper, we provide a detailed and comprehensive survey of the AC mechanisms
in NDN. We follow a holistic approach towards AC in NDN where we first
summarize the ICN paradigm, describe the changes from channel-based security to
content-based security and highlight different cryptographic algorithms and
security protocols in NDN. We then classify the existing AC mechanisms into two
main categories: Encryption-based AC and Encryption-independent AC. Each
category has different classes based on the working principle of AC (e.g.,
Attribute-based AC, Name-based AC, Identity-based AC, etc). Finally, we present
the lessons learned from the existing AC mechanisms and identify the challenges
of NDN-based AC at large, highlighting future research directions for the
community.Comment: This paper has been accepted for publication by the ACM Computing
Surveys. The final version will be published by the AC
Systematizing Decentralization and Privacy: Lessons from 15 Years of Research and Deployments
Decentralized systems are a subset of distributed systems where multiple
authorities control different components and no authority is fully trusted by
all. This implies that any component in a decentralized system is potentially
adversarial. We revise fifteen years of research on decentralization and
privacy, and provide an overview of key systems, as well as key insights for
designers of future systems. We show that decentralized designs can enhance
privacy, integrity, and availability but also require careful trade-offs in
terms of system complexity, properties provided, and degree of
decentralization. These trade-offs need to be understood and navigated by
designers. We argue that a combination of insights from cryptography,
distributed systems, and mechanism design, aligned with the development of
adequate incentives, are necessary to build scalable and successful
privacy-preserving decentralized systems
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