Author : Tal Simeon Garfinkel
Publisher : Stanford University
Page : 143 pages
File Size : 45,5 Mb
Release : 2010
Category : Electronic
ISBN : STANFORD:yp464xx6754
Paradigms for Virtualization Based Host Security by Tal Simeon Garfinkel Pdf
Virtualization has been one of the most potent forces reshaping the landscape of systems software in the last 10 years and has become ubiquitous in the realm of enterprise compute infrastructure and in the emerging field of cloud computing. This presents a variety of new opportunities when designing host based security architectures. We present several paradigms for enhancing host security leveraging the new capabilities afforded by virtualization. First, we present a virtualization based approach to trusted computing. This allows multiple virtual hosts with different assurance levels to run concurrently on the same platform using a novel "open box" and "closed box" model that allows the virtualized platform to present the best properties of traditional open and closed platforms on a single physical platform. Next, we present virtual machine introspection, an approach to enhancing the attack resistance intrusion detection and prevention systems by moving them "out of the box" i.e. out of the virtual host they are monitoring and into a seperate protection domain where they can inspect the host they are monitoring from a more protected vantage point. Finally, we present overshadow data protection, an approach for providing a last line of defense for application data even if the guest OS running an application has been compromised. We accomplish this by presenting two views of virtual memory, an encrypted view to the operating system and a plain text view to the application the owning that memory. This approach more generally illustrates the mechanisms necessary to introduce new orthogonal protection mechanisms into a Guest Operating system from the virtualization layer while maintaining backwards compatibility with existing operating systems and applications.
