Backdoor access to WhatsApp? Rudd's call suggests a hazy grasp of encryption

UK home secretary wants police to be able to access WhatsApp, but any backdoor also makes services vulnerable to criminals

Tech companies are facing demands from the home secretary, Amber Rudd, to build backdoors into their "completely unacceptable" end-to-end encryption messaging apps. Speaking on Sunday, just five days after a terror attack in Westminster killed five and injured more than 50, she said "there should be no place for terrorists to hide".

This may sound familiar. Two years ago, after the Charlie Hebdo attack in Paris, the then British prime minister David Cameron said Britain's intelligence agencies should have the legal power to break into the encrypted communications of suspected terrorists. He promised to legislate for it in 2016.