Meet the watchers on the web.

With the explosive growth of the internet and, specifically, user-generated content and companies’ social media presence, social defence is growing by the day. There are an estimated 250,000 to 350,000 people working as social media monitors globally and close to one million people working in online security and privacy, according to Hemanshu Nigam, former chief security officer of MySpace and founder of Los Angeles-based online safety consultancy SSP Blue.
 Those numbers, he said, are conservative estimates and are changing all the time.
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