NIST Post-Quantum Cryptography PQC Standards and the HNDL Threat Vector
Malicious actors are currently executing "Harvest Now, Decrypt Later" (HNDL) campaigns, exfiltrating large volumes of encrypted sensitive data to facilitate retrospective decryption once Cryptographically Relevant Quantum Computers (CRQCs) become operational. This strategic threat targets long-term data confidentiality, effectively bypassing current classical encryption standards. While NIST has released standardized Post-Quantum Cryptography (PQC) algorithms to mitigate this risk, a critical preparedness gap exists; 66% of cybersecurity professionals acknowledge the risk, but only 5% have implemented formal quantum-readiness strategies. Addressing this requires transitioning from static encryption to cryptoagility—the capability to implement rapid algorithm substitution without fundamental architectural redesigns.