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600.412.lecture05

600.412.lecture05 - Security and Privacy in Cloud Computing...

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Ragib Hasan Johns Hopkins University en.600.412 Spring 2010 Lecture 5 03/08/2010 Security and Privacy in Cloud Computing
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Securing Clouds 3/08/2010 en.600.412 Spring 2010 Lecture 5 | JHU | Ragib Hasan 2 Goal : Learn about different techniques for protecting a cloud against insider adversaries Reading Santos et al., Towards Trusted Cloud Computing , HotCloud 2009 Krautheim, Private Virtual Infrastructure for Cloud Computing , HotCloud 2009 Wood et al., The Case for Enterprise-Ready Virtual Private Clouds , HotCloud 2009
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The IaaS security problem 3/08/2010 en.600.412 Spring 2010 Lecture 5 | JHU | Ragib Hasan 3 The cloud acts as a big black box, nothing inside the cloud is visible to the clients Clients have no idea or control over what happens inside a cloud Even if the cloud provider is honest, it can have malicious sys admins who can tamper with the VMs and violate confidentiality and integrity
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How to ensure that the cloud is not tampered with? Naïve Approach 1 : Just trust the cloud provider Why won’t work: Provider may be honest, sys admins may not be so Naïve Approach 2 : As the cloud provider to allow auditing of the cloud by the client Why won’t work: Providers are not willing to open their system to outside audits Workable Approach 3 : Ask cloud provider for unforgeable proof/attestation Why may work: A third party proof not revealing other information may be enough for both client and provider 3/08/2010 en.600.412 Spring 2010 Lecture 5 | JHU | Ragib Hasan 4
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How to audit with a third party?
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