Still hazy on cloud computers' security

The cloud computing concept is so appealing that the city of Los Angeles is considering scrapping its current e-mail system and replacing it with a cloud-based offering from Google, joining more than 2 million businesses already using that company's system.

But a series of incidents involving cloud computing over the last several months has poked holes in the hype bubble, raising questions about the cloud's dependability -- and whether it's ready for use by a broader group of workers and businesses.

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