dm-verity

actually, there is quite a bit less scandal to Chrome OS devices -- one might say there is none at all. if you read the documentation from the Chromium website, you'd see that the developer switch is a non-negotiable requirement. thus users' freedoms are not impaired in the slightest. don't like Chrome OS ? flip the device and install whatever you want.

http://www.chromium.org/chromium-os/chromiumos-design-doc...

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