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Crypto-agility means your systems can swap out cryptographic algorithms without rewriting applications or causing downtime. It's like having a car where you can swap the engine without redesigning the chassis. You need this because algorithms get broken or deprecated - MD5 fell, SHA-1 fell, and now RSA and ECC are falling to quantum computers. Organizations that hard-coded MD5 into their systems spent years fixing it. Don't make that mistake with RSA. Crypto-agility requires: separating your crypto from your business logic through abstraction layers, using centralized key management that supports multiple algorithms, having automated discovery tools that tell you where you're using what crypto, and testing frameworks for new algorithms. The quantum transition is your forcing function to build crypto-agility now.
NIST says migrate to post-quantum by 2035. That's not much time when you have hundreds of applications and systems. Organizations with crypto-agility can migrate incrementally, test thoroughly, and roll back if needed. Organizations without it face big-bang migrations that always go wrong.
Crypto-agile organizations will migrate to post-quantum cryptography at 60% lower cost according to industry estimates. More importantly, they can respond to unexpected crypto breaks - if one of the new NIST algorithms turns out to have a weakness, you can pivot quickly instead of spending years on another rewrite.
Migrating from RSA to post-quantum key exchange, supporting hybrid cryptography during transition, responding to algorithm deprecations, meeting evolving compliance requirements, enabling zero-downtime security upgrades, managing multi-cloud cryptography
https://www.qnulabs.com/blog/ | https://www.qnulabs.com/qnu-labs-hybrid-approach-blending-quantum-and-post-quantum-cryptography-for-future-proof-security/
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