What happens when today’s secure cryptography becomes tomorrow’s weakness? The answer isn’t just choosing a stronger algorithm. It’s building systems that can adapt. This is called cryptographic agility. It means designing protocols so cryptographic algorithms can be replaced without rebuilding the entire system. Why does this matter? → Algorithms evolve: new vulnerabilities can emerge. → Standards change: better alternatives may become available. → Migration takes time: systems need a practical upgrade path. → Quantum threats add urgency: post-quantum cryptography will also continue to evolve. The goal isn’t to predict which algorithm will last forever. It’s to avoid depending on one forever. That’s an important lesson for blockchain design, and one reason @tezos’ ongoing protocol evolution is worth following. Can a blockchain truly be future-ready if its cryptography cannot be upgraded easily?