What is Q-Day?

This episode of Techsplainers explores Q-Day, the point at which quantum computers become capable of breaking the public-key cryptography that protects digital systems today. Rather than treating Q-Day as a single dramatic moment, this episode explains why many experts now view it as a gradual process that will unfold unevenly over time as different cryptographic systems become vulnerable at different rates.

The episode walks through the traditional definition of Q-Day, why improvements...