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?…