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Security Fundamentals & Crypto · Advanced

Cryptographic Agility

Ability to replace cryptographic algorithms, keys, and parameters quickly without major system redesign.

Definition

Crypto-agility requires knowing where cryptography is used, abstracting algorithm choices into configuration or libraries, and automating key and certificate management. It is essential for responding to broken algorithms and for post-quantum migration. NIST and CISA identify crypto-agility as a key migration enabler.

Example

An application reads its signature algorithm from configuration so it can switch from ECDSA to ML-DSA without code changes.

Exam tip

Crypto-agility is the strategic answer to future algorithm breaks, including quantum threats.

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