Google designed its data centers with security in mind.
Rather than storing each user's data on a single machine or set of machines, we distribute all data — including our own — across many computers in different locations. We then chunk and replicate the data over multiple systems to avoid a single point of failure. We name these data chunks randomly, as an extra measure of security, making them unreadable to the human eye.
While you work, our servers automatically back up your critical data. So when accidents happen — if your computer crashes or gets stolen — you can be up and running again in seconds.
Lastly, we rigorously track the location and status of each hard drive in our data centers. We destroy hard drives that have reached the end of their lives in a thorough, multi-step process to prevent access to the data.
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