def encrypt(cls, pk, *args):
        """
        For convenience, the synopsis of the encoding method is given below;
        however, this section, [NIST-SP800-56A], and [RFC3394] are the
        normative sources of the definition.

            Obtain the authenticated recipient public key R
            Generate an ephemeral key pair {v, V=vG}
            Compute the shared point S = vR;
            m = symm_alg_ID || session key || checksum || pkcs5_padding;
            curve_OID_len = (byte)len(curve_OID);
            Param = curve_OID_len || curve_OID || public_key_alg_ID || 03
            || 01 || KDF_hash_ID || KEK_alg_ID for AESKeyWrap || "Anonymous
            Sender    " || recipient_fingerprint;
            Z_len = the key size for the KEK_alg_ID used with AESKeyWrap
            Compute Z = KDF( S, Z_len, Param );
            Compute C = AESKeyWrap( Z, m ) as per [RFC3394]
            VB = convert point V to the octet string
            Output (MPI(VB) || len(C) || C).

        The decryption is the inverse of the method given.  Note that the
        recipient obtains the shared secret by calculating
        """
        # *args should be:
        # - m
        #
        _m, = args

        # m may need to be PKCS5-padded
        padder = PKCS7(64).padder()
        m = padder.update(_m) + padder.finalize()

        km = pk.keymaterial

        ct = cls()

        # generate ephemeral key pair, then store it in ct
        v = ec.generate_private_key(km.oid.curve(), default_backend())
        ct.vX = MPI(v.public_key().public_numbers().x)
        ct.vY = MPI(v.public_key().public_numbers().y)

        # compute the shared point S
        s = v.exchange(ec.ECDH(), km.__pubkey__())

        # derive the wrapping key
        z = km.kdf.derive_key(s, km.oid, PubKeyAlgorithm.ECDH, pk.fingerprint)

        # compute C
        ct.c = aes_key_wrap(z, m, default_backend())

        return ct