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FIPS 203, 204, and HQC Explained: What Security Architects Need to Know About NIST's Finalized PQC Standards

FIPS 203, 204, and HQC Explained: What Security Architects Need to Know About NIST's Finalized PQC Standards

Security architects are now encountering FIPS 203 and FIPS 204 in vendor documentation, procurement requirements, and compliance frameworks — but the naming conventions around these standards are genuinely confusing. Kyber, ML-KEM, and FIPS 203 are related but not interchangeable references. The same problem applies to Dilithium, ML-DSA, and FIPS 204. Misusing
PQC Information