WHY SIGNAL'S POST-QUANTUM MAKEOVER IS AN AMAZING ENGINEERING ACHIEVEMENT

Summary from the TLDR newsletter

Signal's latest updates are a significant step towards the messaging platform becoming fully quantum-resistant. Nothing will change for users as the changes are all under-the-hood - the apps will behave almost exactly as they did before. Signal has documented in great depth about the new design along with mathematical proof verifying that the updated protocol provides the claimed security properties. This article provides an overview of how the updated protocol works.