Is user data safe in the cloud?

With the rise of cloud computing companies, and the ferocity with which tech's biggest companies are snatching those firms up, it's no secret that a good chunk of our user data is already stored in the cloud. Our emails, our documents, our social network profiles and hundreds of thousands of tiny startups already rely on cloud services like SalesForce.com to be more productive and cost-effective. But one concern that remains constant is that of security. By off-loading more data to the cloud, are companies increasingly opening themselves and their users up to hacking, data loss, and privacy compromises?

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