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Trusting Cloud Computing
Trust is an important word in the world of security
By: Eric Chiu
Dec. 6, 2009 02:00 PM
The company I work for, HyTrust, recently worked with Intel and VMware on a very cool project.
Essentially, it was about demonstrating the ability to establish trust in the cloud, and then enforce policy based on trust.
Trust is an important word in the world of security, and in cloud computing it's an even bigger deal.
Cloud computing offers up the promise that an organizations will be able to run any application from anywhere at any time. But in a multi-tenant environment, a cloud application running in a virtual machine might be located on any number of hosts in a virtualized datacenter, and running next to others' virtual machines on those hosts.
So, if we're talking about critical applications - for example, a credit card transaction system - how can anyone guarantee the environment is secure? It's a difficult problem and one that must be solved. It's absolutely essential for trust to be established before customers can feel confident about turning over their applications to cloud infrastructure.
And that's where we began.
The prototype we developed with Intel and VMware is a strong one. It uses hardware-level security capabilities to protect against software-based attacks and to establish a "trust status" for the system. And the beauty part is that policy can then be enforced based on that trust status (for example, allowing virtual machines to be powered on or live migrated only to trust hosts). Intel's TXT technology essentially allows trust to be measured at boot-time and for applications to run within their own execution environment. VMware's vSphere technology then provides APIs which HyTrust leverages to determine this trust status which then gets included in the policy decisions that HyTrust makes for the virtual infrastructure.
TXT will be embedded in Intel's next generation chip technology for 2010 and going forward. By providing hardware-level security through to the hypervisor with HyTrust, the virtualized host can be secured and trusted. This will not only provide differentiation for Intel, VMware and HyTrust but also drive value for end consumers similar to how digital signatures are used to validate the authenticity of electronic documents.
How does all this affect consumers of cloud computing in the long run?
Well, as industry insiders know, cloud environments today have no uniform standard for security and compliance. Similar to banking before FDIC insurance became standard, consumers of cloud services have no way to compare the security of cloud providers on an apples-to-apples basis. This issue will become more and more important as cloud computing evolves and companies host a greater number of critical systems and applications in their cloud environments. The "trust measurement" of cloud environments is still up in the air and many options are being proposed. It very well may end up becoming similar to the type of VeriSign certificates that are used to validate the authenticity of e-commerce websites. And one day we might also be looking to see a certified "stamp" of approval.
In fact, perhaps someday trust will be as easy to identify as the Intel Inside logo.
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