A Quantum-Resistant Signature Doesn’t Make Your Blockchain Quantum-Safe

This story was originally published on HackerNoon at: https://hackernoon.com/a-quantum-resistant-signature-doesnt-make-your-blockchain-quantum-safe.
Quantum-safe blockchain design requires more than replacing ECDSA. This article examines the protocol layers that still matter after post-quantum migration.
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Replacing ECDSA with ML-DSA can remove one major quantum vulnerability, but system-level security also depends on key derivation, public-key exposure, transaction formats, replay protection, and operational design.