19 December 2014 Last updated at 06:25 GMT

Hundreds of thousands of men around the world are falling victim every year to a pernicious form of online crime.

It has been nicknamed "sextortion" and is a form of blackmail.

Victims are normally lured in through social media sites; the blackmailers are criminal gangs operating in countries like the Philippines.

Angus Crawford reports.

http://www.bbc.com/news/technology-30544685 Click to watch video from BBC

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