As quantum computing grows closer to reality, current cryptographic systems—like RSA and Elliptic Curve—risk becoming obsolete because quantum algorithms can break them. That’s why researchers and standards bodies around the world are working on new post-quantum cryptography (PQC) methods. However, completely replacing established systems **can take years or even decades.** Enter hybrid cryptography, which blends PQC with classical methods (or multiple PQC methods) to ease the transition while boosting resilience. ![[Hybrid Cryptography.png]] ### **Three Key Facts** 1. **Combined Strength:** By pairing a post-quantum algorithm with a traditional one, hybrid cryptography aims for protection at least on par with the strongest algorithm used. In practical terms, if your policy requires verifying _both_ signatures in a hybrid digital signature, the overall security is as robust as the best signature. 2. **Gradual Migration:** Hybrid solutions let organizations test and deploy PQC in real-world environments without immediately abandoning their existing standards and certifications. Think of it as a safety net—if a PQC algorithm turns out to be weaker than expected, classical cryptography is still there to back you up (and vice versa). 3. **Resiliency and Agility:** Quantum-ready systems must be agile—easy to update whenever new threats or better cryptographic methods emerge. Hybrid approaches help maintain cryptographic diversity, allowing organizations to swap out compromised algorithms quickly while minimizing risk and downtime. --- ### **So What?** Organizations that handle sensitive data (trade secrets, financial transactions, government documents—anything worth protecting for years to come) should start planning now. Begin by evaluating your current encryption tools and setting up a roadmap toward adopting PQC standards. Where feasible, deploy hybrid cryptographic methods to test how they perform under real conditions. Stay agile, keep tabs on evolving standards (like NIST’s upcoming PQC selections), and collaborate with solution providers who offer proven, tested implementations. These steps will help ensure your data remains locked away safely—even when tomorrow’s quantum machines arrive. Dive deeper: - [[Crypto-agility]] - [[Why Cryptographic Inventory Matters]] - [[hybrid cryptography]] - [[Building Cryptographic Agility in the Financial Sector]] - [[The Pillars of Cryptographic Discovery and Inventory - A Blueprint for Post-Quantum Security]] - [[The End of One-Size-Fits-All Cryptography - Adapting to Diverging Standards]]