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Green Hills Opens Padded Cell Doors

Desktops and embedded platforms virtualized ‘securely’

By P J Connolly

December 20, 2007 — Sometimes, a padded cell can be a good place.

Green Hills Software certainly thinks so, having named its recently announced secure hypervisor just that. The company calls Padded Cell the world’s first secure hypervisor, and it runs on top of the company’s Integrity separation kernel.

Green Hills is pushing the Padded Cell architecture as a superior way to implement virtualization with its use of kernel-level security policies and virtual machine separation. This is meant to avoid the problem of an attacker subverting the hypervisor itself and taking over the entire virtual infrastructure, the company notes. Founder and CEO Dan O’Dowd explained in the announcement, “Existing hypervisors actually make security problems worse, by providing another avenue for attack.”

Padded Cell allows the virtualization of a wide range of operating systems, including BSD, Red Hat Linux, Solaris and Windows, according to the company, but it doesn’t stop there. It also works with the Integrity and Linux operating systems, as well as Wind River Systems’ VxWorks, for use in embedded deployments. Green Hills claims to be the first to offer a secure virtualization platform for VxWorks.

But the virtualization support isn’t just about software. Padded Cell can take advantage of hard-based virtualization support, such as Intel’s vPro technology. This, said Intel’s Gregory Bryant in a statement, allows Green Hills to “enhance the security capabilities of its Integrity PC” desktop platform by taking advantage of such features as trusted execution. Bryant is vice president of Intel’s digital enterprise group and general manager of the digital office platform division.

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