public static Ciphersuite defaultSuite() {
        return Ciphersuite.of(Kem.dHKemX25519HkdfSha256(), Kdf.hkdfSha256(), Aead.aes128Gcm());
    }
Returns a Ciphersuite of DHKEM(X25519, HKDF-SHA256), HKDF-SHA256, AES-128-GCM
security-utils/src/main/java/com/yahoo/security/hpke/Ciphersuite.java