Xiao D.

I’m a PhD-trained computer scientist and published researcher who specializes in demystifying modern cryptography. My teaching focus is helping students truly understand cryptography, not just memorize formulas or copy implementations. My approach connects rigorous mathematics with intuitive, hands-on understanding. Concepts that often feel abstract become clear “aha” moments through carefully designed coding exercises, visualizations, and step-by-step reasoning. Students learn to see the alg…