This 25-minute conference talk explores the significant threat quantum computing poses to traditional cryptography systems. Andrew Lord, Senior Manager at Optics and Quantum Centre of Excellence, examines how quantum computers could potentially break widely-used encryption methods that currently protect sensitive data. Discover the two main approaches being developed to counter these threats: Post-Quantum Cryptography (PQC) and Quantum Key Distribution (QKD). Understand the fundamental differences between these security strategies and learn how organizations worldwide are preparing to transition to quantum-resistant security protocols. The presentation was recorded live at Networking Field Day 37 in San Francisco on March 19, 2025.