cm/pub/sntrup761-x25519

    [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.

    Its algorithm identifier is "sntrup761-x25519".
    Its public key value is a concatenation of 1158-byte
    SNTRUP761 public key and 32-byte X25519 one.

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