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

Summary from the TLDR InfoSec newsletter

Signal Messenger has rolled out a major upgrade to its encryption protocol, making it resistant to future quantum computer attacks. This technical overhaul adds a third layer—a quantum-safe ratchet—to its already-robust system to ensure strong privacy even if classical encryption breaks. Thanks to clever use of chunking methods and erasure codes, Signal's triple ratchet protects users' messaging by combining classic and quantum-safe security mechanisms, all without impacting everyday use.