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5. Key Usage Bits

This section preserves the RFC text for ML-KEM in PKIX, including algorithm identifiers, SubjectPublicKeyInfo, private key formats, ASN.1 objects, security considerations, and examples.

5.  Key Usage Bits

   The intended application for the key is indicated in the keyUsage
   certificate extension; see Section 4.2.1.3 of [RFC5280].  If the
   keyUsage extension is present in certificates, then keyEncipherement
   MUST be the only key usage set for certificates that indicate id-alg-
   ml-kem-* in SubjectPublicKeyInfo, (with * being one of 512, 768, or
   1024.)
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