Skill Level Intermediate
- [Instructor] In 2017, a satellite named Micius after the fifth century Chinese scientist beamed photons from space to ground stations in Austria and China. The photos communicated a unique key that could then be used for encrypting communications between teams in both countries. The experiment successfully created a completely secure communications channel. Intercepting or eavesdropping on the transmitted key was not possible, as it would require defying the laws of physics. Quantum cryptography is opening up a new groundbreaking chapter in secure communications. The science involved originates in quantum physics, the study of the behavior of the subatomic world, such as particles and waves. Unlike classical mechanics that relies on Newton's laws of motion and related concepts, the quantum realm has its own set of rules. While classical mechanics has enabled the computers that we all use today, quantum mechanics enables a completely new information theory of computing. This now includes possibilities for quantum-based encrypted communications. To say a new day is dawning for cybersecurity would be an understatement. Hi, I'm Jonathan Reichental and this is my Introduction to Quantum Cryptography course. Okay, let's jump right in and discover the wonderful feature of quantum cryptography.