1PQC vs QKD — New Maths or New Physics?Post-quantum cryptography is deployable new mathematics; quantum key distribution is specialised new physics for rare links.Readiness 2The Readiness MethodologyA practical five-phase way to turn post-quantum concern into an owned, funded, repeatable migration programme.Readiness 3Cryptographic Discovery and the CBOMA Cryptographic Bill of Materials (CBOM) shows where cryptography lives, what it protects, and what must change first.Readiness 4Crypto-AgilityCrypto-agility turns quantum migration from a one-off algorithm swap into the ability to change cryptography quickly, safely, and repeatedly.Readiness 5Risk and Data ClassificationUse data shelf life, trust-anchor exposure, and migration difficulty to turn a cryptographic inventory into a defensible post-quantum work plan.Readiness