There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

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A Break in the Clouds: Towards a Cloud Definition

The crucial role that networking plays in Cloud computing calls for a holistic vision that allows combined control, management, and optimization of both networking and computing resources in a Cloud environment, which leads to a convergence of networking and Cloud computing. Network virtualization is being adopted in both telecommunications and the Internet as a key attribute for the next generation networking. Virtualization, as a potential enabler of profound changes in both communications and computing domains, is expected to bridge the gap between these two fields. Service-Oriented Architecture (SOA), when applied in network virtualization, enables a Network-as-a-Service (NaaS) paradigm that may greatly facilitate the convergence of networking and Cloud computing. Recently the application of SOA in network virtualization has attracted extensive interest from both academia and industry. Although numerous relevant research works have been published, they are currently scattered across multiple fields in the literature, including telecommunications, computer networking, Web services, and Cloud computing. In this article we present a comprehensive survey on the latest developments in service-oriented network virtualization for supporting Cloud computing, particularly from a perspective of network and Cloud convergence through NaaS. Specifically, we first introduce the SOA principle and review recent research progress on applying SOA to support network virtualization in both telecommunications and the Internet. Then we present a framework of network-Cloud convergence based on service-oriented network virtualization and give a survey on key technologies for realizing NaaS, mainly focusing on state of the art of network service description, discovery, and composition. We also discuss the challenges brought in by network-Cloud convergence to these technologies and research opportunities available in these areas, with a hope to arouse the research community's interest in this emerging interdisciplinary field.

A Survey on Service-Oriented Network Virtualization Toward Convergence of Networking and Cloud Computing

Many publications have dealt with various types of security requirements in cloud computing but not all types have been explored in sufficient depth. It is also hard to understand which types of requirements have been under-researched and which are most investigated. This paper's goal is to provide a comprehensive and structured overview of cloud computing security requirements and solutions. We carried out a systematic review and identified security requirements from previous publications that we classified in nine sub-areas: Access Control, Attack/Harm Detection, Non-repudiation, Integrity, Security Auditing, Physical Protection, Privacy, Recovery, and Prosecution. We found that (i) the least researched sub-areas are non-repudiation, physical protection, recovery and prosecution, and that (ii) access control, integrity and auditability are the most researched sub-areas.

https://www.researchgate.net/profile/Maya_Daneva/publication/261038126_Cloud_computing_security_requirements_A_systematic_review/links/54d0b8980cf20323c219005f.pdf

Cloud computing security requirements: A systematic review

Welcome to the 19th SOSP, and to the beautiful Adirondack mountains of New York State! Larry Peterson and his committee have put together a strong and varied technical program, showcasing the most significant and influential work in operating systems today. Other program highlights include the poster and work-in-progress sessions, the Anita Borg luncheon and the evening banquet on Monday, and the SIGOPS business meeting Tuesday evening. The banquet will include presentation of the third annual Mark Weiser award, and eulogies for Roger Needham and Anita Borg, both of whom were lost to us this year. The business meeting will include presentation of awards in the first-ever SIGOPS division of the ACM Student Research Competition (SRC).Entrants in the SRC include all the regular papers and posters on which a student is principal author. To help to put the competition on an equal footing, four poster finalists will be making formal presentations during the session on Monday afternoon. Many thanks to Kevin Jeffay and his subcommittee for organizing the poster session and judging the submissions, and to Ann Sobel for her help in bringing SIGOPS into the SRC.Continuing the tradition of past SOSPs, we have encouraged student attendance through reduced registration fees and a strong program of financial scholarships. Generous support for this program has come from Microsoft via the SRC, from the National Science Foundation (CISE CCR), from Hewlett-Packard Labs, and from SIGOPS itself. Thanks to Cary Gray and his scholarship committee (John Carter, Norm Hutchinson, Marc Shapiro, and Bob Wisniewski) for their outstanding work under very tight time constraints.

Proceedings of the nineteenth ACM symposium on Operating systems principles

Cloud computing is widely considered as an attractive service model since the users commitments for investment and operations are minimised, and costs are in direct relation to usage and demand. However, when networking aspects for distributed clouds are considered, there is little support and the effort is often underestimated. The project SAIL is addressing cloud networking as the combination of management for cloud computing and vital networking capabilities between distributed cloud resources involved to improve the management of both. This position paper presents new security challenges as considered in SAIL for ensuring legitimate usage of cloud networking resources and for preventing misuse.

Challenges for Cloud Networking Security

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This paper presents an approach to speed up and enhance matching of virtual network requests to available resources in virtual network provisioning frameworks. The method consists of introducing a weight or score expressing the importance of the resources, their attributes and the values taken by these attributes. The scores are obtained through statistical analysis of the requests for virtual network resources. Previous methods treat resources equally and experience longer delays and lower efficiency during the matching process. They were originally not designed for virtual network provisioning and the proposed method in this work aims at addressing their weaknesses in scalability, in resource representation and incremental updates. To highlight this new method, a functional comparison with these previous techniques is proposed. Evaluation results of the score based clustering and matching algorithm show improved scalability and performance in clustering efficiency and matching delays for virtual network provisioning.

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Design, Implementation and Evaluation of Virtual Resource Description and Clustering Framework

This work presents an open cloud interface extension to merge cloud computing and networks into one modeling and representation framework to extend clouds beyond data centers and enable cloud networking to set up distributed cloud infrastructures. The proposed extension to the de facto standard interface in cloud computing (OCCI) is named Open Cloud Networking Interface (OCNI). OCNI is presented and evaluated in terms of its ability to integrate smoothly with existing cloud computing interfaces and to provide all the required capabilities to express connectivity requirements and ease connection establishment between cloud computing, network and storage nodes at the virtual and physical level irrespective of underlying transport technologies.

OCNI - Open Cloud Networking Interface

This paper presents a preliminary work on the development of a metalist-based description framework to efficiently describe and search for virtualized network resources for virtual network provisioning Virtual resources are perceived as objects that can be described using metadata and semantically searched according to a set of criteria The virtual resource objects are described by Infrastructure Providers that should advertise and offer their virtual resource descriptions to virtual network providers These virtual network providers discover and match user queries for VNs with the virtual resources offered by the infrastructure providers This work introduces the concept of metalist which is a simple and efficient way to specify sets of metadata for objects and explores how it is used to efficiently support virtual resource description

Houssem Medhioub

Papers

Challenges for Cloud Networking Security

Challenges for Cloud Networking Security

Design, Implementation and Evaluation of Virtual Resource Description and Clustering Framework

OCNI - Open Cloud Networking Interface

A Framework to Describe and Search for Virtual Resource Objects