WEEK 2 RECAP: What Exactly Is the Crypto Problem? Quantum computers won’t simply make blockchains disappear. The real risk is more specific. Here are the 7 things to understand: - Digital signatures prove ownership and authorise transactions. - Elliptic-curve cryptography protects many blockchain signatures. - Shor’s algorithm could break the mathematical assumptions behind these systems. - Grover’s algorithm can weaken some search-based security. - Hashing isn’t simply broken. Its security impact is different. - Exposed public keys matter. Some account and key designs face greater risks than others. - Migration takes time. Blockchains need to prepare before quantum computers pose a practical threat. The key lesson? Quantum readiness is about identifying vulnerabilities and planning a transition, not predicting the end of crypto. @tezos is preparing for this right now Next week: Why is migrating an entire blockchain so difficult? If a blockchain needed to replace its cryptography, what would be the biggest challenge: wallets, smart contracts, or network-wide coordination?