Foundations — Guide
What Is Crypto-Agility? A Complete Guide
The foundational definition, and why it's separate from post-quantum readiness.
Definition
Crypto-agility is the ability to switch cryptographic algorithms as needed, without revising existing application code.
Why It Matters Now
The looming threat of quantum computing makes crypto-agility a priority for the modern business. NIST recommends organizations begin transitioning away from classical public-key algorithms well before cryptographically relevant quantum computers arrive.
Where It Lives
Crypto-agility isn't just a PKI concern — it lives in infrastructure, application code, and third-party dependencies alike.