Security and the private cloud in .NET framework

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Security and the private cloud
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This chapter covers Learning about information security in the public cloud Considering the deployment of private clouds Using private clouds to your advantage Getting to know virtual private clouds
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In the previous chapter, you learned about the economics of cloud computing or, more specifically, the economics of public cloud computing. You saw that for startups, the use of the cloud can often be game-changing, enabling entrepreneurs to launch services that were never before possible. They can create new businesses with very little capital. Small and medium-size enterprises can use the public cloud for applications that aren t necessarily strategic to their business. These can be moved into the cloud to great advantage. Large enterprises with a few notable exceptions, and mostly for their nonstrategic uses are much more reticent to move to the cloud, due to security concerns. In this chapter, you ll learn how they can overcome these issues and still benefit. You ll see two alternatives to public clouds: private clouds and virtual private clouds.
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Information security in the public cloud
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Private clouds (and virtual private clouds) are a hot topic in IT; a wide range of opinions exists about whether private clouds fit into today s corporate IT strategy. Cloud computing technologies, in general, are evolving rapidly with private cloud computing in particular undergoing a rapid metamorphosis. A classic (and humorous) example is our research for this chapter. We spent a couple of days experimenting and putting together a private cloud implementation from open source. When we got around to writing the chapter several weeks later, we found that some folks had put together an even simpler procedure. What took us two days only a couple of weeks earlier could now be done in a matter of hours! Some industry analysts, such as the Gartner Group, predict that private cloud spending will soon exceed public cloud spending. Consultancy McKinsey, on the other hand, goes as far as saying that there s no such thing as a private cloud and that by focusing on virtualization, you can improve the efficiency of internal IT operations and increase the utilization of existing resources to the point where you can beat the economics of the public cloud. We disagree with this extreme view. Security concerns and the economics of existing data centers are the two drivers toward private clouds. Both will eventually go away; the tenure of real (versus virtual) private clouds is temporary. Security is the hot-button du jour, so you need to know the facts about information security. If you aren t familiar with the technical underpinnings of information security, please refer to this book s appendix, which provides a review of the key concepts.1
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Information security in the public cloud
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Information security is about keeping data secret. If you want to keep data perfectly secret, you must never let it out of a vault. But you need to process the data in some way, and that means it has to come out of the vault and be used by some application and combined with other data to produce useful results. Security has a funny way of making people issue dogmatic statements. You ll hear declarations such as My sensitive corporate data will never be in the cloud repeated all the time. Let s begin this section with an examination of why security concerns are slowing cloud adoption.
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The most significant difference between cloud security and traditional infrastructure security stems from the sharing of infrastructure on a massive scale. Users spanning different corporations and trust levels often interact with the same set of compute resources. Layer on top of that the dynamic and transient aspects endemic to a public cloud, the desire to continually load-balance and optimize for performance, energy, availability, and other SLA-level goals, and the problem becomes further complicated, creating more opportunities for misconfiguration and malicious conduct. When IDC
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One of the authors has an authoritative book on this topic: Securing Web Services with WS-Security by Jothy Rosenberg and Dave Remy, Sams, 2004.
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