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Cyber extortion a growing threat

Newsnight's David Grossman reports on the growing threat to technology companies posed by cyber extortionists.

For people making a living online, someone killing their internet connection could put their entire business in jeopardy.

This is the threat a new wave of cyber extortionists are holding over tech companies.

The weapon the extortionists use is a distributed denial of service (DDoS) attack to block access to their websites, accompanied by demands for money to stop the attack.

BBC Newsnight's David Grossman reports.