A huge network of hijacked computers is sending out notes threatening to publish compromising images, researchers say.Read more
Investigating cyber criminals who use your password to threaten to expose you on social media.
Thousands of people all over the world have been receiving sextortion emails from scammers who include the victim's real password in the message. BBC Trending reporter Jo Whalley has also been sent one of these emails. Despite having no worries about her browsing history, Jo was concerned when one of her current passwords showed up in the subject line of the scam email. She's been finding out how cyber criminals have got hold of people's personal information and how you can protect yourself from hackers.
Experts say that Ivory Coast in West Africa has become a hotspot for the scammers.
A victim of online blackmail says other people in a similar situation should "always tell somebody".