Signal's president, Meredith Whittaker, stated that the company will not comply with the proposed UK law requiring mandatory message scanning before encryption, calling it 'mathematically impossible' and a threat to user privacy. The law aims to give the government backdoor access to end-to-end encryption systems. Signal and other companies, like WhatsApp, have committed to exiting the UK market if the law is enacted. The proposal has sparked criticism from tech giants, security experts, and privacy advocates.