Web 2.0 technologies, such as Facebook, MySpace and Twitter, are a major security concern for businesses, according to research by Deloitte.

A survey of 200 technology, media and telecommunications firms shows 83% view the exploitation of vulnerabilities in Web 2.0 as a significant threat .

“In some cases, employees unintentionally release sensitive information without realising the consequences,” said James Alexander, partner in Deloitte’s Security and Privacy Team.

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