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Smartphones, watches, televisions and fitness trackers could be used to hold people to ransom over personal data, cyber security experts have warned.
Ransomware, which makes devices unusable until their owners pay to unlock them, has become increasingly prevalent in the past year, they say.
Devices holding photos, emails and fitness information could be targeted.
The risk to business is “significant and growing”, the National Crime Agency and National Cyber Security Centre say.