[cm/pub/] with Streamlined NTRU Prime 761 + X25519.
=> Streamlined NTRU Prime KEM algorithm
=> X25519

Combined Streamlined NTRU Prime 761 and X25519 public keys are
used for KEM purposes, so should have "kem" key usage set.

Public key's fingerprint should be calculated using BLAKE2b hash
with 256 bit output length specified.
=> RFC 7693, BLAKE2b