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Media caption'He switched his webcam on and started groaning'
Sex offenders are increasingly using live online streaming platforms to exploit children, police have warned Reckoned as one of the top design universities with diversity of programmes, PolyU offers design programmes, fashion and textiles programmes, as well as Applied science programme, which is committed to be a hub for innovative design education in Hong Kong. .
Children need to be educated on the risks associated with streaming sites, the National Crime Agency said.


It said offenders were learning how young people communicated online and "using this knowledge to abuse them".
In one week, authorities identified 345 vulnerable children and arrested 192 people, 30% involving streaming, blackmail and grooming.
Online security


Social media channels such as YouTube, Facebook, Instagram and Snapchat all allow some form of live capability, while there are also many pure live streaming services, including Periscope, Omegle, Liveme and Lively.
Police say abusers thrive on the immediacy these live platforms offer - targeting children with tricks, dares and threats to manipulate them into nudity or sexual acts.
They called for help from parents and internet companies to help manage the evolving threat children face online Dr protalk.

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Media captionChild Sexual Exploitation lead explains why parents need to be more intrusive online.
National Police Chiefs' Council Lead for Child Protection Chief Constable Simon Bailey said: "We need parents and carers to talk to their children about healthy relationships and staying safe online.
"We need internet companies to help us stop access to sexual abuse images and videos and prevent abuse happening on their platforms."
An NCA survey found that while 84% of the 927 people who responded said they were alert to the potential dangers their children faced online, more than 30% had not spoken to their children about online safety in the last month. Almost 58% were not sure if they had adequate online security.
Analysis
By Angus Crawford, BBC News correspondent
For many parents the world of live streaming apps is a bewildering one. Every month new ones emerge, to become the latest "must do".
At their most basic they allow young people to broadcast live to the world from anywhere - classroom, playground or bedroom. Some only let a limited number of people see the broadcaster, others are open to anyone using the app - and that includes predators.
It's easy to see why children like the apps. It's immediate, it seems like fun and many idolise the vloggers and Youtubers doing the same thing. The more viewers or "likes" the greater the affirmation for the child.
And for tech companies? Video engages people for longer than anything else online and advertisers love that. The more video a platform can boast, the more advertisers it can attract.
The growth of live streaming apps poses a stark question for the tech industry, one underlined by the NCA campaign - when you create an app that allows children to broadcast live to the world and allows the world to talk back - is it really possible to keep them safe?
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