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A hot potato: Signal has issued a warning over the UK government's latest online safety push. The encrypted messaging app says plans to make phones and tablets scan for nude images will not protect children, and instead risk creating surveillance infrastructure that "endangers us all."

The device-scanning proposal was announced by Prime Minister Keir Starmer at London Tech Week. Under the plan, companies such as Apple and Google would be expected to activate built-in features on smartphones and tablets that detect and block nude images on children's devices.

The government wants the protections applied across an entire device, including cameras, third-party apps, search functions, and messaging services.