London — Technology companies must cooperate more with law enforcement agencies and should stop offering a "secret place for terrorists to communicate" using encrypted messages, British interior minister Amber Rudd said on Sunday. Local media have reported that British-born Khalid Masood sent an encrypted message moments before killing four people last week by ploughing his car into pedestrians and fatally stabbing a policeman as he tried to get into parliament in an 82-second attack that struck terror in the heart of London. There may be difficulties in taking on technology companies — in the United States, officials have been trying to make US technology firms provide a way around encryption, talks that have intensified since a mass shooting in San Bernardino. But while saying she was "calling time on terrorists using social media as their platform", Rudd also appealed for cooperation from the owners of encrypted messaging apps such as Facebook’s WhatsApp, backing away from seekin...

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