The UK government and a coalition of charities are urging the British public to put pressure on Facebook not to introduce end-to-end encryption (E2EE) on its Messenger service. If Facebook rolls out the ultra-secure messaging system, the campaign says, more children will be put at risk from online predators. The public debate is likely to be fierce, as privacy campaigners and technology companies argue the system is needed to protect personal privacy and data security. And the battle is being watched closely around the world, as many governments are also keen to halt the spread of end-to-end encryption in its current form. For years, authorities in the UK, Australia, Canada, New Zealand, United States, India and Japan plus law enforcement agencies such as Interpol and the UK's National Crime Agency (NCA) have criticised the technology. Meanwhile, billions of people have embraced end-to-end encryption by using services such as WhatsApp, iMessage and Signal. On social media, the UK Home Office tweeted a video illustrating messages from a predator to a child, disappearing behind the encryption. Meanwhile, the Open Rights Group tweeted a video in opposition, claiming: "Criminals love [Home Secretary] Priti Patel's plan to break encryption."