Encryption ban proposal in the United Kingdom
The UK encryption ban was a pledge by former British prime minister David Cameron to ban online messaging applications that offer end-to-end encryption, such as WhatsApp, iMessage, and Snapchat, under a nationwide surveillance plan. Cameron's proposal was in response to the services which allow users to communicate without providing the UK security services access to their messages, which in turn could allegedly allow suspected terrorists a safe means of communication.
Source: Wikipedia — Encryption ban proposal in the United Kingdom (CC BY-SA 4.0)