Phase 5: Migration & Real World
Knowing the algorithms is only half the battle. The real challenge is migration — replacing deeply embedded cryptography in production systems, often without taking anything offline. This phase covers the practical strategies, tools, and real-world context you need to actually make systems quantum-safe.
Crypto-Agility: Design for Change
The architectural pattern that lets you swap cryptographic algorithms without rewriting everything. Why you should build this into every system you touch.
Learn crypto-agility →Post-Quantum TLS Migration
How HTTPS is being upgraded right now. Hybrid key exchange, X25519Kyber768, and what Cloudflare, Google, and Apple are already doing.
Explore PQ-TLS →PQC in Payments & Banking
Why financial infrastructure is the most urgent migration target. EMV, SWIFT, payment gateways, and the regulatory timeline banks are racing against.
Explore PQC in finance →Open Source PQC Libraries
liboqs, BoringSSL, OpenSSL 3.x, PQClean — what's available today, what's production-ready, and how to get started.
Explore libraries →The Road Ahead: Quantum-Safe Future
Quantum Key Distribution, quantum networks, post-quantum zero-knowledge proofs, and what a fully quantum-safe internet looks like.
See the future →Frequently Asked Questions
What will I learn here?
This page covers the core concepts and techniques you need to understand the topic and progress confidently to the next lesson.
How should I use this page?
Start with the overview, then follow the section links to deepen your understanding. Use the table of contents on the right to jump to specific sections.
What should I read next?
Use the navigation below to continue to the next lesson or explore related topics.